We are testing whether adding words that are relevant to the user's intent will increase clicks and improve ranking. Our hypothesis is that if we add a keyword that is closely aligned with the user's intent, we will see an increase in CTR and, as a result, better performance in terms of ranking. If you have any thoughts on this test, please share them with us on LinkedIn. Google's search rater's guidelines heavily focus on a user's intent, so it's only logical that page titles should align with what the user is looking for. For example, if a user is looking to buy a product, they will more than likely search for words like "for sale." However, if a user is simply looking to do research on a product, they are not ready to buy and will not be helped by a page that is title "for sale." In a recent study, it was shown that 6.8% of users interacted better with pages that were titled according to their intent. The purpose of this SplitSignal SEO test was to see if adding a keyword related to the searcher's intent would increase clicks. The results showed that it did indeed have a positive effect, increasing clicks by 6.8%. This just goes to show that SEO changes can be site and niche specific, so it's important to do your own research and SEO testing.
(source: https://www.semrush.com/blog/seo-split-test-the-effect-of-search-intent-specific-keywords-in-your-title)