Under each post, you will see the reaction feature, just click on the reaction you like based on your reaction about each post. I have three reactions:
1) L.O.V.E it!! :D
Choose this one if you really love the post so much.
2) Not Bad!! ^^
Choose this one, if you like the post, (but not really love it), & think its good but think it could be better or needs a bit of improving.
3) Hate it!! x(
Choose this reaction to show your ultimate dislike/hate to the post.
Remember that reactions should be based on the 'style of writing' & not only the 'topic' itself.