I second this. I know SEO is a controversial term with Lemmy's core audience, but being able to find posts through a search engine is pretty darn helpful. It'll also help more people find their way to Lemmy, which will diversify the range of communities.

If you're not sure where to start, Google's free Search Console can give you insight into how your site ranks, how people are finding you and which factors are preventing instances from appearing in search.