OK. I'm still learning stuff on Mastodon. People keep saying "use alt text". Being the techy luddite that I am, I had no idea what this is or how and why. So, I googled it (as you do).

If all this is baffling for you, like it is for me, here's a good article that explains it in easily understood terms (unlike some other stuff I read!)

Hope this helps!

(And many thanks to people who spend time writing helpful articles like this one!!)

https://edtechfactotum.com/adding-alt-text-and-more-to-images-in-mastodon/