Does anyone know what it means on twitter when people put ">>>>" or "<<<<" after a sentence?

[Ima]

For example, a person is like: A guy with abs >>> or something like that. I see on twitter all the time but not quite sure what it is... Someone fill me in

[Vamp]

In general > indicates a preference or a liking for something. It can be used in the format dog>cat (I like dogs better than cats) or by itself. The more characters, the stronger the liking.

I would read your example as someone admiring the guy

< means the opposite, a dislike.

However they are both also used as "arrow" signs to draw attention to something.