@klandwehr I only learned about it last year, and it's very cool. Alt-text is when you type in a short description of your photo for people who are visually impaired, so they can "see" the photos too. Manton added a feature where you can tap on a photo after you upload it and add a brief description, to make it easy.

Without alt-text, a person with visual impairment might be reading a conversation about a photo, with no way of knowing what it is people are talking about. I imagine that's pretty frustrating, so now that I know about alt-text I take an extra 10 seconds and type in photo descriptions whenever the technology allows.