What kind of writing is your writing? There's sure to be a WriteWords group to suit. And it's not just about giving feedback to train your writerly skills, and getting feedback to help develop your writing. The groups are also the place to find support and swap information from other writers who are doing the same kind of work, and meeting and overcoming the same kinds of difficulties.
Tthere are groups for people writing for children, for those writing flash poetry, commercial short stories, non-fiction articles, and lots of others. But there are also groups for writers seeking a particular kind of feedback.
There's Polish and Perfection, where WriteWorders give super-detailed critiques to help each other hone their prose, and learn the microscopic attention that trains your writerly muscles as nothing else can.
At the other end of the scale, Whole MS read-swapping is a dating agency for WriteWorders who want to find someone to swap their books with. Someone really has to love you, to reading the whole of your novel-in-progress, but there's no other way to find out how it would strike a real reader. If you don't have a dedicated, quick-reading and knowledgable partner at home - or even if you do - then you need the Whole MS read-swapping group.
There's even a group - Fast First Draft -where critiquing isn't the point: it's all about supporting each other, celebrating word counts and ways of circummventing that naggy little voice of your Inner Critic.
Intensive Critique is the reverse - members commit to giving honest, considered and detailed critique, and are encouraged to upload regularly, and to critique at least three other writers' work for each piece they upload themselves.
So, what kind of thing do you write? And what kind of feedback would you like to give, and get?