Faceted navigation makes it possible for your shoppers to search for the exact products they are looking for by filtering and sorting by specific product attributes. These attributes include things, like color, size, material, brand, etc.
Faceted navigation is great for the user experience, because it allows people to essentially do a custom search of your products, but it can have consequences for SEO (search engine optimization). That’s because faceted navigation leads to the creation of lots and lots of URLs and duplicate content. It also wastes more of Google’s crawl budget.
Luckily, you can fix this issue easily by using no-index tags to tell Google which pages not to crawl. You can also use robots.txt, which tells Google what pages to look at and what not to, as well as canonical tags, which define the main page for Google when there are multiple pages that are duplicate or similar.