What is 佈施? I found it on a bilingual blog
I guess you might want to tag it as religion (or move it to religion section in SE) as this is a question more related to buddhism than chinese language.  From this link:

布施

指把自身所擁有或所知道的施予他人。除了財物的布施 (財布施) 外，還包括佛法的傳揚 (法布施) 和信心的給予 (無畏布施)。

I'll try giving a simple explanation:  

It means to give / donate all you have / all you knows (your knowledges) to others.  Other than giving out all your wealth, it includes spreading of buddhism and giving others confident.