One of the peculiarities of is the lack of text search.
This is actually beneficial! It makes it harder for trolls to search for words or phrases for the purposes of harassment. But the con of this is that it makes it difficult for people to discover your public posts.
That's where hashtags come in! Hashtags are fully searchable/subscribe-able between federated instances, So if you want your art/comics/musings to be seen, hashtags are the best way to reach a specific audience!