I use all sorts of sites to post and publish my ongoing/completed works.
I've used Inkitt and Wattpad in the past, but in my option Tapas is my favorite by far. The site layout is nice and I like how it not only supports novels but comics too, and additionally I like how I can email the staff if I ever want to try out paid stories (which that is one of my goals here eventually).
Wattpad I truly despise out of the writing sites I tried out before, and now the layout of the site is just horrible. I used to use the site a lot when I was a child/teen and now I only post my works there for promotional reasons.
For my completed and fully edited works I currently publish using Amazon and Barnes & Noble. Now I am looking into Apple Books and more.