A Full Information for SEOs


URL parameters or question strings are the a part of a URL that sometimes comes after a query mark (?) and are used to move knowledge together with the URL. They are often lively parameters that modify web page content material or passive parameters which might be principally used for monitoring and don’t change the content material.

They’re made up of key-value pairs, the place the important thing tells you what knowledge is being handed and the worth is the information you’re passing, akin to an identifier. They appear like ?key=worth however could also be separated by ampersands (&) like ?key=worth&key2=value2 if there’s multiple pair. 

Parts of a URL parameter
Rationalization of URL parameter components.

On this information, we’ll be overlaying what you should learn about URL parameters.

As I discussed within the intro, parameters will be lively or passive. Let’s have a look at some examples of every.

Lively parameters

Lively parameters modify the content material of the web page in some means. 

Filter. Removes a few of the content material, leaving extra particular content material on the web page {that a} consumer desires to see. An instance of that is faceted navigation in e-commerce. 


Kind. Reorders the content material in a roundabout way, akin to by worth or ranking.


Paginate. Divides content material right into a sequence of associated pages.


Translate. Modifications the language of the content material.


Search. Queries a web site for data {that a} consumer is in search of.

On our search engine, yep.com, we use the important thing “q” for the question, and the worth comprises data in regards to the consumer question.


Passive parameters

Passive parameters don’t change the content material. They’re sometimes used for monitoring. Let’s have a look at some examples of every.

Affiliate IDs. Passes an identifier used to trace the place gross sales and signups come from.


Promoting tags. Tracks promoting campaigns.


Session IDs. Identifies a specific consumer. It’s not widespread on trendy web sites to make use of session IDs to trace customers.


Video timestamps. Jumps to the designated timestamp in a video.


URL parameters may cause quite a lot of completely different points with regards to search engine optimisation, particularly in circumstances the place a number of parameters are used. Listed below are a few of the issues you could encounter.

Passive parameters may cause points with duplicate content material. Usually, you need them to be crawled, and every web page ought to have a canonical set to the primary model. 

There could also be instances the place you need to block these parameters from being crawled fully utilizing robots.txt—however solely in conditions the place you might have points with crawl finances. We’ll cowl this extra later.

Google will select a model of the web page to index in a course of known as canonicalization, and alerts akin to hyperlinks will consolidate to that listed model.

Lively parameters could create pages with near-duplicate content material or content material that’s similar to different content material. They might even be fully completely different content material. You’ll have to verify what your parameters are literally used for.

Inner hyperlinks

You need to keep away from passive parameters like these used for monitoring on inside hyperlinks (hyperlinks from one web page in your web site to a different). 

That is nonetheless an all-too-common apply on bigger websites, however I need to emphasize that that is an outdated and outdated apply that you simply shouldn’t be doing. 

Most analytics programs have occasion monitoring you should use as an alternative that also information the information with out including parameters to your URLs.

It’s superb to make use of lively parameters on inside hyperlinks in most circumstances.


Infinite URL paths with parameters or tons of various combos may cause points with crawling. Hold a constant order, and don’t have paths that permit for including extra parameters.

You’ll be able to simply discover doubtlessly infinite paths utilizing the Depth report beneath the Construction Explorer instrument in Website Audit. It’s not widespread for web sites to have 9+ ranges, so it is a sturdy indicator that there could, actually, be infinite paths or another concern.

Structure Explorer's Depth report
Depth report in Construction Explorer.

Google will make changes because it acknowledges infinite paths or sure patterns when crawling. It would attempt to restrict the crawling of URLs that it thinks gained’t be helpful or are repetitive.


URL parameters are typically used for worldwide web sites. These are listed as an choice for locale-specific URLs. However even Google says it’s not beneficial. It provides one other layer of complexity the place extra issues can go flawed. You additionally gained’t have the ability to geo-target these URLs in Google Search Console.


Parameters are generally utilized in e-commerce for all the things—from monitoring, to pagination, to faceted navigation. These subjects will be fairly complicated, so I like to recommend studying by the weblog posts I linked to raised perceive them.


There’s a rising development the place individuals are utilizing # as an alternative of ? because the fragment identifier, particularly for passive parameters like these used for monitoring. That is typically not a good suggestion. However in particular circumstances, it could be OK to do that to exchange pointless parameters. I are likely to advocate towards it due to the entire points.

The issue is something after a # is ignored by servers, and quite a lot of programs merely won’t or can not acknowledge parameters utilizing a #.

Moreover, # already has a chosen use case, which is to scroll to part of the web page. That is executed on the shopper aspect, and JavaScript devs may use it for “routing” to a web page with completely different content material.

It’s a good suggestion to verify what parameters are used in your web site. In Website Audit’s Web page Explorer instrument, you’ll be able to seek for URLs that comprise a query mark (?).

Searching for parameters in Page Explorer
Looking for parameters in Web page Explorer.

You need to use the superior filters to seek out pages with a number of parameters or to begin excluding parameters that can assist you establish all the assorted parameters used in your web site.

As soon as you recognize what parameters are used, I like to recommend checking a number of of the pages to see what the parameters really do.

You too can verify the Duplicates report for actual or near-duplicates. The visible makes it simple to see if in case you have quite a lot of variations of the identical or comparable pages and whether or not or not they’ve matching canonical tags to decide on a most well-liked model. You’ll be able to click on into every cluster to get extra data.

Duplicate content tree map
Duplicate content material tree map view to point out clusters.

There’s additionally an choice beneath “Bulk export” that allows you to export the entire duplicate content material without delay. I discover this feature simpler to make use of for bigger units of knowledge.

Up to now, Google had a URL parameter instrument in Google Search Console the place you would select learn how to deal with completely different parameters based mostly on whether or not or not it modified the web page content material. The instrument was deprecated in early 2022. Right here’s what Google needed to say about it:

When the URL Parameters instrument launched in 2009 in Search Console’s predecessor, Webmaster Instruments, the web was a a lot wilder place than it’s immediately. SessionID parameters have been quite common, CMSes had bother organizing parameters, and browsers usually broke hyperlinks. With the URL Parameters instrument, web site homeowners had granular management over how Google crawled their web site by specifying how sure parameters have an effect on the content material on their web site.

Through the years, Google grew to become significantly better at guessing which parameters are helpful on a web site and that are —plainly put— ineffective. Actually, solely about 1% of the parameter configurations at present specified within the URL Parameters instrument are helpful for crawling. As a result of low worth of the instrument each for Google and Search Console customers, we’re deprecating the URL Parameters instrument in 1 month.

Whereas not talked about, I believe that some customers might need been hurting themselves with the instrument. I bumped into this up to now the place somebody put in a flawed setting that stated the content material didn’t change, however it did. This knocked a number of hundred thousand pages out of the index for that web site. Whoops!

You’ll be able to let Google crawl and determine learn how to deal with the parameters for you, however you even have some controls you’ll be able to leverage. Let’s have a look at your choices.

Canonical tags

A canonical tag may also help consolidate alerts to a selected URL however requires every extra model of a web page to be crawled. As I discussed earlier, Google could make changes because it acknowledges patterns, and these canonicalized URLs could also be crawled much less over time. 

That is what I’d go for by default. But when a web site has a ton of points and parameters are uncontrolled, I could have a look at a few of the different choices.


A noindex meta robots tag removes a web page from the index. This requires a web page to be crawled. However once more, it could be crawled much less over time. Should you want alerts to consolidate to different pages, I’ll keep away from utilizing noindex.

Blocking in robots.txt

Blocking parameters in robots.txt implies that the pages should still get listed. They’re not more likely to present in regular searches.

The issue is that these pages gained’t be crawled and gained’t consolidate alerts. If you wish to consolidate alerts, keep away from blocking the parameters.

Website Audit

When establishing a challenge in Website Audit, there’s a toggle within the crawl settings known as “Take away URL Parameters” that you should use to disregard any URLs with parameters.

You too can exclude parameterized URLs within the crawl setup utilizing sample matching.

Blocking a parameter in the crawl setup
Blocking a parameter in Website Audit.


Enjoyable reality: We solely depend the canonicalized model of pages towards your crawl credit.

Closing ideas

Simply to summarize, URL parameters have quite a lot of completely different use circumstances, they usually could or could not trigger points on your web site. Every thing is situational.

Message me on Twitter if in case you have any questions.


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