I go for facebook because its easy to use and you can easily find friends post. And the most appealing thing about facebook is that if you get tagged in any thing by the second friend then the 3rd friend could see in their newsfeed. But in Instagram the 3rd friend is not able to see the tagged by 2nd friend. Instagram is also the good social networking site. The most good thing about Instagram than Facebook is that you can explore new things in explore tab. Explore tab is the best way to pass your time when you are bored and know about trending things.