the 872 flowers were given to you by other cuties, you can give someone a flower by clicking on the little flower at your question,your answer or your project.And when you do; you see the color of the flower change. For instance here they turn into orange. I just did so now you have 873 flowers.
The flowers at the projects are orange and when you click on these they turn into grey.
And it's nice to get and to give flowers, who does not love the smell of lovely flowers.Hope this answers your question.

It is a fondness gesture, friendship and gratefulness.
The more you takes part, more you ganhar, OK?!
A flower for you.

The flowers are from your Cuties friends. The more you participate in the forum, the more flowers you get. You can give flowers to others by clicking on the little flower at the top of the question or post. If they like your question or post, they send you a flower. It's a way to be friendly here.