Heres how I promote my webcomic: First, heading that applies to the forum page I'm posting to, second, my series cover. third a lil blurb about my comic, and finally the link. heres an example bellow of what I do on Comic promotion forum ages! 
If you like slice of life and a bit of mystery My comic TLC might be up your alley!
The comic is about a young girl that gets kicked out of an orphanage for her unpredictable powers and ends up getting taken in by a shapeshifter into a mish-mashed adopted family. she has to learn what it means to be herself, be part of a family, and uncover whatever the family's butler is hiding before its too late!
The comic has got aspects of modern fantasy, mystery, found family, slice of life and LGBT themes (mostly i later chapters). I'd probably rate it at PG-13 (specific Pages with PG-13 content are flagged as such in the episode tittles as well)
Heres the link if interested!
