Should I canonicalize URLs with no query params even though query params are always automatically appended?

[LeahH]

There's a section of my client's website that presents quarterly government financial data. Users can filter results to see different years and quarters of financial info.

If a user navigates to those pages, the URLs automatically append the latest query parameters. It's not a redirect...when I asked a developer what the mechanism was for this happening, he said "magic." He honestly didn't know how to describe it.

So my question is, is it ok to canonicalize the URL without any query parameters, knowing that the user will always be served a page that does have query parameters? I need to figure out how to manage all of the various versions of these URLs.

[seoelevated]

I would recommend to canonicalize these to a version of the page without query strings, IF you are not trying to optimize different version of the page for different keyword searches, and/or if the content doesn't change in a way which is significant for purpose of SERP targeting. From what you described, I think those are the case, and so I would canonicalize to a version without the query strings.

An example where you would NOT want to do that would be on an ecommerce site where you have a URL like www.example.com/product-detail.jsp?pid=1234. Here, the query string is highly relevant and each variation should be indexed uniquely for different keywords, assuming the values of "pid" each represent unique products. Another example would be a site of state-by-state info pages like www.example.com/locations?state=WA. Once again, this is an example where the query strings are relevant, and should be part of the canonical.

But, in any case a canonical should still be used, to remove extraneous query strings, even in the cases above. For example, in addition to the "pid" or "state" query strings, you might also find links which add tracking data like "utm_source", etc. And you want to make sure to canonicalize just to the level of the page which you want in the search engine's index.

You wrote that the query strings and page content vary based on years and quarters. If we assume that you aren't trying to target search terms with the year and quarter in them, then I would canonicalize to the URL without those strings (or to a default set). But if you are trying to target searches for different years and quarters in the user's search phrase, then not only would you include those in the canonical URL, but you would also need to vary enough page content (meta data, title, and on-page content) to avoid being flagged as duplicates.

[LeahH]

This is VERY helpful, thank you so much.