@[email protected] Short answer: no. :) Longer answer: you can search your instance, which will include everything you follow and anyone else on your instance follows. *And* you can manually go to a different instance and search there, which will similarly include anything which anyone on that instance follows. For a large instance that will be pretty comprehensive. You might logically conclude from this that it wouldn't be hard to build a service which did this on "all known instances" and would therefore provide a global search, but there has been extremely strong pushback from the community against attempts to build such a thing (including quite recently). (Pushback includes banning the IP range of the search bot, unfederating, Drama, etc.) The thinking is that global search mostly benefits trolls who want to jump in on your feeds, and that for "real people" having knowledge of your local community is more important.
@elizschafer @onekade The short answer is that anyone who follows you also copies your posts to their local server, which means then that any search for that hashtag on that local server will turn up your posts.
So since I follow you, if you used #BrooklineTownMeeting in a post, then anyone else on my server kolektiva.social would be able to see your (and my) posts in a search.
That's why your choice of server "kinda doesn't matter" and "kinda does matter". If you had an account on (say) better.boston, like @wutrain, then the local feed is probably already full of local folks. mastodon.social is such a big instance that it will probably end up indexing a big percentage of the total fediverse as well. But the key to getting useful search results is your local community.
@dcporter @elizschafer yep:
https://mastodon.social/@Gargron/103393780267601137
Haven't tried it yet myself, so can't vouch, but it all seems straightforward.