This is a very rough and indefinite classification of twitter bots by their content. It is by no means exhaustive and many of the bots overlap different classifications. The focus will be on the creative and generative possibilities of twitter bots rather than simulating human conversation or automating tasks.
Firstly, What are twitter bots? Well a bot is software designed to autonomously perform a certain task. For twitter bots, those tasks would the things you and I do on twitter. So, things like looking to see who is following us, tweeting, retweeting, liking, subtweeting. Twitter bots would be able to do all or some of that but without a human involved in every stage of the process.
Bots that make versions of memes.