Sharing publications on our walls : how to do it?

A member of my group asked for this:

Hello everybody! How are you?
I have seen that on the wall some share publications from other girls, finished work, etc... in the SHARE section
I have no clue how to do it, can you help me?
Thank you so much!



And I dont remember how to do it either!

Crochetera183

Thank you!