idiggory, King of Bards wrote:
It's a micro blogging platform, so it's not really limited to any one particular area. If people blog about it, it probably has decent representation on tumblr.
Content is accessed by searching tags, or by (as most users do) checking their dashboard. The dash just shows all content blogged or reblogged by the blogs you choose to follow. Gaming, fashion, fandom, photography (nature, cities, etc.). It's really just depends on your interests.
So it's basically a mainstream sankaku complex meets reddit or some sh*t like that, got it. I think pretty much the only place I search for anything with tags is sad panda.
I have no clue what Sankaku is...
It's really just Wordpress, but the way blog posts are accessed is centralized (if you want it to be, which most do). Many writers use tumblr as a way to interact with their fanbase (from fiction writers to game writers, like David Gaider), game developers use it to easily disseminate information/concept art, etc. You have some actors like Matthew Gray Gubler using it.
Very popular with photographers, graphic artists, etc. Free way to disseminate their own work, and create a cohesive blog to show off their aesthetic for potential clients. And then, because it's a free service, a whole lot of porn blogs, hipster blogs, fandom blogs, etc.
It's not a forum like reddit, or image board.