How to check whether specific pages are index or noindex?

I'm working on an eCommerce store using the shopify platform. I read that sorting filters and pagination can lead to duplicate content issues (especially on stores like mine with a lot of text on collection pages).

For example these four pages would all be viewed as duplicate content:

widgets.com/collection/bluewidgets
widgets.com/collections/bluewidgets?page=2
widgets.com/collections/bluewidgets?sort_by=title-descending
widgets.com/collections/bluewidgets?page=2&sort_by=title-descending

^ The first page is the page i actually want indexed, the additional pages are extra pages created by pagination or sorting

I read this article about the issue, although i'm not sure the code included in the article will help my site specifically. https://leanmetrics.io/blog/3-most-common-seo-problems-shopify/

I added the recommended code from the article.

How can i test to see if the pages i do no want indexed are marked "noindexed"?

Thanks

Just check the source code. It will contain "noindex" right at the beginning if the site is indeed set to noindex.

You probably want to canonicalise them, not noindex them if they are all the same page.

Unreliable Witness said:

You probably want to canonicalise them, not noindex them if they are all the same page.

Click to expand...

I was going off this article (how i found out about the potential problem) and it said that wouldn't fix the issue
https://ahrefs.com/blog/ecommerce-seo/

jm12345 said:

I was going off this article (how i found out about the potential problem) and it said that wouldn't fix the issue
https://ahrefs.com/blog/ecommerce-seo/

Click to expand...

I can only suggest to read further about the difference between the two. Moz has a good article on it for example.

For you, it might be that you want to noindex. For e-commerce stores I have worked on, adding the canonical tag to pages that show the same products filtered in some way has worked.