Some general 'best practices' for new Masto users! 
As our rules state, any art that's adult/NSFW/sexual/violent etc. in nature needs to be hidden behind a content warning (the 'CW' button beneath the toot window) or with the media marked as sensitive (you'll see this option after adding media to your toot). It's not enough to just hide the media, though - you have to say *why* it's content warned, otherwise users can't make an informed decision on whether to click or not.
(cont)
The Mastoverse at large has many blind and partially sighted users who would still love to engage with your creative content!
We strongly encourage use of image alt text to describe the images and videos you upload, and a lot of people won't boost ('retweet') content with no alt text.
After adding an image or video to your toot, you can click 'Edit' on the media to enter a description.
Media that doesn't have alt text will have a little blue dashed border around it in the feed.
As well as CWing NSFW images, people also content warn things that could be triggering or cause anxiety - most commonly faces, especially if there's eye contact, but also anything related to phobias, like bugs or holes.
Be kind, be conscientious, be compassionate. If in doubt, add a content warning. Remember that you are interacting with a hugely diverse community. <3
Mastodon•ART 🎨 Curator
Mar del Valle