Twitter can be really useful for academia where the character limit forces you to condense the main points of your research into one or a couple of short bullet points. Together with a small gif and links to project page and arxiv, this makes it really easy to get attention for your work and follow that of others. Sometimes it is even possible yo start some meaningful discussions there.
You have to carefully curate who to follow though.
You have to carefully curate who to follow though.