Yep basically thats it in one.
Lets say Im selling home made Jumpers..
But your a dab hand with the magic needles and would like to get your fetching designs on my site. Im so busy knitting I need you to deal with supplying me the relevant content. You join/register with my site, you then create a post/advert of which includes images, video and copy. Bobs your uncle and I go off to that London about taking this little upstart public. 10% goes to one J Marsland, happily ever after :)