How do you use hashtags?

As Mastodon doesn't have a real search function, hashtags are some kind of opt-in discoverability feature. However, I am curious whether people actually really use them.

Please boost (usually I wouldn't ask you for that, but in this case it makes sense).

#Hashtags #Discoverability #Search #Poll #Mastodon #MastodonDiscussion #FediverseDemographics #FediSociology