What Can Log File Data Tell Me That Tools Can’t? – Ask An SEO

For right now’s Ask An search engine optimisation, we reply the query:

“As an search engine optimisation, ought to I be utilizing log file knowledge, and what can it inform me that instruments can’t?”

What Are Log Recordsdata

Primarily, log recordsdata are the uncooked file of an interplay with a web site. They’re reported by the web site’s server and sometimes embrace details about customers and bots, the pages they work together with, and when.

Usually, log recordsdata will comprise sure info, such because the IP tackle of the particular person or bot that interacted with the web site, the user agent (i.e., Googlebot, or a browser if it’s a human), the time of the interplay, the URL, and the server response code the URL offered.

Instance log:

6.249.65.1 - - [19/Feb/2026:14:32:10 +0000] "GET /class/footwear/running-shoes/ HTTP/1.1" 200 15432 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36" 

• 6.249.65.1 – That is the IP tackle of the consumer agent that hit the web site.
• 19/Feb/2026:14:32:10 +0000 – That is the timestamp of the hit.
• GET /class/footwear/running-shoes/ HTTP/1.1 – The HTTP methodology, the requested URL, and the protocol model.
• 200 – The HTTP standing code.
• 15432 – The response dimension in bytes.
• Mozilla/5.0 (Macintosh; Intel Mac OS X 14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 – The consumer agent (i.e., the bot or browser that requested the file)

What Log Recordsdata Can Be Used For

Log recordsdata are probably the most correct recording of how a consumer or a bot has navigated round your web site. They’re usually thought-about probably the most authoritative file of interactions along with your web site, although CDN caching and infrastructure configuration can have an effect on completeness.

What Search Engines Crawl

One of the crucial vital makes use of of log recordsdata for search engine optimisation is to grasp what pages on our web site search engine bots are crawling.

Log recordsdata enable us to see which pages are getting crawled and at what frequency. They may also help us validate if vital pages are being crawled and whether or not often-changing pages are being crawled with an elevated frequency in comparison with static pages.

Log recordsdata can be utilized to see if there’s crawl waste, i.e., pages that you just don’t wish to have crawled, or with any actual frequency, are taking on crawling time when a bot visits a web site. For instance, by log recordsdata, you could establish that parameterized URLs or paginated pages are getting an excessive amount of crawl consideration in comparison with your core pages.

This info may be vital in figuring out points with web page discovery and crawling.

True Crawl Price range Allocation

Log file evaluation can provide a real image of crawl budget. It might assist with the identification of which sections of a web site are getting probably the most consideration, and that are being uncared for by the bots.

This may be vital in seeing if there are poorly linked pages on a web site, or if they’re being given much less crawl precedence than these sections of the location with much less significance.

Log recordsdata may also be useful after the completion of extremely technical search engine optimisation work. For instance, when a web site has been migrated, viewing the log recordsdata can help in figuring out how rapidly the adjustments to the location are being found.

By means of log recordsdata, it’s additionally attainable to find out if adjustments to a web site’s construction have truly aided in crawl optimization.

When finishing up search engine optimisation experiments, it’s essential to know if a web page that is part of the experiment has been crawled by the bots or not, as this may decide whether or not the take a look at expertise has been seen by them. Log recordsdata can provide that perception.

Crawl Habits Throughout Technical Points

Log recordsdata may also be helpful in detecting technical issues on a web site. For instance, there are cases the place the standing code reported by a crawling device is not going to essentially be the standing code {that a} bot will obtain when hitting a web page. In that occasion, log recordsdata could be the one approach of figuring out that with certainty.

Log recordsdata will allow you to see if bots are encountering non permanent outages on the location, but additionally how lengthy it takes them to re-encounter those self same pages with the proper standing as soon as the problem has been fastened.

Bot Verification

One very useful characteristic of log file evaluation is in distinguishing between actual bots and spoofed bots. That is how one can establish if bots are accessing your web site beneath the guise of being from Google or Microsoft, however are literally from one other firm. That is vital as a result of bots could also be getting round your web site’s safety measures by claiming to be a Googlebot, whereas, the truth is, they wish to perform nefarious actions in your web site, like scraping knowledge.

Through the use of log recordsdata, it’s attainable to establish the IP vary {that a} bot got here from and examine it in opposition to the recognized IP ranges of legitimate bots, like Googlebot. This could help IT groups in offering safety for a web site with out inadvertently blocking real search bots that want entry to the web site for search engine optimisation to be efficient.

Orphan Pages Discovery

Log recordsdata can be utilized to establish inside pages that instruments didn’t detect. For instance, Googlebot could know of a web page by way of an exterior hyperlink to it, whereas a crawling device would solely have the ability to uncover it by way of inside linking or by way of sitemaps.

Trying by way of log recordsdata may be helpful for diagnosing orphan pages in your web site that you just had been merely not conscious of. That is additionally very useful in figuring out legacy URLs that ought to not be accessible through the location however should be crawled. For instance, HTTP URLs or subdomains that haven’t been migrated correctly.

What Different Instruments Can’t Inform Us That Log Recordsdata Can

In case you are at present not utilizing log recordsdata, you might be utilizing different search engine optimisation instruments to get you partway to the perception that log recordsdata can present.

Analytics Software program

Analytics software program like Google Analytics can provide you a sign of what pages exist on a web site, even when bots aren’t essentially in a position to entry them.

Analytics platforms additionally give loads of element on consumer conduct throughout the web site. They can provide context as to which pages matter most for industrial targets and which aren’t performing.

They don’t, nevertheless, present details about non-user conduct. In actual fact, most analytics applications are designed to filter out bot conduct to make sure the information offered displays human customers solely.

Though they’re helpful in figuring out the journey of customers, they don’t give any indication of the journey of bots. There isn’t a technique to decide which sequence of pages a search bot has visited or how usually.

Google Search Console/Bing Webmaster Instruments

The various search engines’ search consoles will usually give an outline of the technical well being of a web site, like crawl points encountered and when pages had been final crawled. Nonetheless, crawl stats are aggregated and efficiency knowledge is sampled for big websites. This implies you could not have the ability to get info on particular pages you have an interest in.

Additionally they solely give details about their bots. This implies it may be troublesome to convey bot crawl info collectively, and certainly to see the conduct of bots from firms that don’t provide a device like a search console.

Web site Crawlers

Web site crawling software program may also help with mimicking how a search bot may work together along with your web site, together with what it will possibly technically entry and what it will possibly’t. Nonetheless, they don’t present you what the bot truly accesses. They can provide info on whether or not, in idea, a web page could possibly be crawled by a search bot, however don’t give any real-time or historic knowledge on whether or not the bot has accessed a web page, when, or how continuously.

Web site crawlers are additionally mimicking bot conduct within the situations you might be setting them, not essentially the situations the search bots are literally encountering. For instance, with out log recordsdata, it’s troublesome to find out how search bots navigated a web site throughout a DDoS assault or a server outage.

Why You May Not Use Log Recordsdata

There are numerous the explanation why SEOs may not be utilizing log recordsdata already.

Issue In Acquiring Them

Oftentimes, log recordsdata usually are not easy to get to. Chances are you’ll want to talk along with your growth staff. Relying on whether or not that staff is in-house or not, this may increasingly actually imply attempting to trace down who has entry to the log recordsdata first.

For groups working agency-side, there’s an added complexity of firms needing to switch doubtlessly delicate info exterior of the group. Log recordsdata can embrace personally identifiable info, for instance, IP addresses. For these topic to guidelines like GDPR, there could also be some concern round sending these recordsdata to a 3rd occasion. There could also be a must sanitize the information earlier than sharing it. This generally is a materials value of time and assets {that a} consumer could not wish to spend merely to share their log recordsdata with their search engine optimisation company.

Consumer Interface Wants

Upon getting entry to log recordsdata, it isn’t all clean crusing from there. You have to to grasp what you’re looking at. Log recordsdata of their uncooked kind are merely textual content recordsdata containing string after string of information.

It isn’t one thing that’s simply parsed. To actually make sense of log recordsdata, there’s normally a must put money into a program to assist decipher them. These can vary in value relying on whether or not they’re applications designed to allow you to run a file by way of on an ad-hoc foundation, or whether or not you might be connecting your log recordsdata to them in order that they stream into this system constantly.

Storage Necessities

There’s additionally a must retailer log recordsdata. Alongside being safe for the explanations talked about above, like GDPR, they are often very troublesome to retailer for lengthy durations resulting from how rapidly they develop in dimension.

For a big ecommerce web site, you may see log recordsdata attain a whole bunch of gigabytes over the course of a month. In these cases, it turns into a technical infrastructure difficulty to retailer them. Compressing the recordsdata may also help with this. Nonetheless, on condition that points with search bots can take a number of months of information to diagnose, or require comparability over very long time durations, these recordsdata can begin to get too large to retailer cost-effectively.

Perceived Technical Complexity

Upon getting your log recordsdata in a decipherable format, cleaned and able to use, you truly must know what to do with them.

Many SEOs have an enormous barrier to utilizing log recordsdata merely based mostly on the actual fact they appear too technical to make use of. They’re, in any case, simply strings of details about hits on the web site. This could really feel overwhelming.

Ought to SEOs Use Log Recordsdata?

Sure, in case you can.

As talked about above, there are lots of the explanation why you could not have the ability to pay money for your log recordsdata and rework them right into a usable knowledge supply. Nonetheless, as soon as you’ll be able to, it should open up a complete new degree of understanding of the technical well being of your web site and the way bots work together with it.

There will likely be discoveries made that merely couldn’t be achieved with out log file knowledge. The instruments you might be at present utilizing could nicely get you a part of the best way there. They’ll by no means provide the full image, nevertheless.

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Featured Picture: Paulo Bobita/Search Engine Journal