popular type of story is the emotional one. You've definitely seen the posts
that show rescue animals and ask you to like if you think they're cute. Or
maybe it's a medical story where you're asked to like that the person was cured
or to let them know they're still beautiful after surgery.
are also the posts that ask for a like to show that you're against something
the government is doing, or that you disagree with something terrible happening
in the world.
any post that asks you to like it for emotional reasons, unless you know the
person who created the original post, is quite probably a like-farming post.
best bet to avoid like-farming is to be very judicious about what you like and
share on Facebook. Don't just reflexively click "like" on everything.
Take a look at where the post is coming from. If it's from someone you don't
recognize, it could be a friend of a friend or it could be a complete stranger.
It would be good to find out.
the content and whether it promises anything for liking or sharing. If it does,
it's a good clue that it's a scam of some kind. The same goes if you feel
pushed or pressured into clicking like or share.