The impact of Algolia on SEO
If implemented well, Algolia has a positive impact on SEO. Most search engines value good performance and user experience, and Algolia helps with both.
If you need search engines to index your search pages – on e-commerce websites for example – there are a few things to take into account to make sure they’re crawled.
Many duplicate pages
By indexing search results, you can have duplicate content due to indexing of faceted pages that show the similar results.
This can lead to a situation where link equity is spread across pages, and none has enough to rank highly in search results. You can solve this with the canonical link tag. It’s like telling search engine crawlers “Yes, this page is a duplicate, so please give all of the link equity to this other page.”
In other words, make sure you use canonical URLs to indicate primary content.
To do this, you need to use the browser APIs that let you manipulate the browser history. This is also a good UX principle, independent of the SEO benefits. Note that we do this automatically with our InstantSearch.js libraries if you enable routing.