What is SESTA? It is the Stop Enabling Sex Traffickers Act
What is FOSTA? It is the Allow States and Victims to Fight Online Sex Trafficking Act
Although these sound great (Stopping sex trafficking is great!) like many laws they don't actually have the intended consequences. Basically it was the normal politician "but the children!" cry.
https://www.congress.gov/bill/115th-congress/house-bill/1865
Actual outcomes - Sex Work is being conflated with Sex Trafficking and many sites are being bullied into going offline, internet providers no longer are protected by section 203 safe harbor, and they are enabling or pushing overly-prudish regulations.
Impacts
Who pushed these laws? Who benefits?
Groups polaris project are pushing these agendas, as well as benefiting from it. They are selling/promoting their training and services to help "spot sex traffickers."
Resources & people to follow