Undergraduate / outline and thesis statement about facebook harmfull and most clicked [2]

i will write an assay about facebook harmfull but i don t know how write:( this is first essay and will be my passing score. i need an outline and thesis statement. topic is about facebook . my thesis statement:

Despite the harm Facebook inflicts on society, it is the most frequently used site...is this a thesis statement? how can i continue that?answer can be short sentences thank you...