understand why it isn't included when I search just for "tex4ht" with no other keywords.
Yes, I get that result too. Yes, it is strange. I know of no way to determine why search results are what they are. Independent of search results, it would be good to keep the wikipedia page up to date, in a general way (that does not require ongoing maintenance). Can you make a pass over it with your recent-ish changes in mind? I've just changed mn.html to have an actual link to tug.org/tex4ht. Maybe that will help. I'd make it redirect, but there are lots of links to mn.html#something throughout the pages, and it seems painful to break them. Maybe you could also link to tug.org/tex4ht from various places in your documentation, blogs, wherever? E.g., https://github.com/michal-h21/helpers4ht/wiki/tex4ht-tutorial which I see is another top search result. The general problem of updating Eitan's documentation remains :(. -k