Post is an imagine with 4 panels: Top title: before you leave the house check you have: panel 1: keys panel 2: wallet panel 3: phone panel 4: the vague sense that you've forgotten something
(I've never made text descriptions before, correct me for points)
why would you need a text description when you can just look at the image
Because some people can't see well enough to read the text on the image or identify what's happening in it. They use screen readers that read text out loud for them but those screen readers can't recognize the text or context of the picture either so we put a text description, so people with bad vision can still enjoy the memes through those screen readers
In addition to what the others already said, sometimes, Lemmy is a little weird and doesn't load (all) images (happened to a lot of images hosted on the db0 instance a few days ago), and alt texts are really helpful when that happens.
i had imgbb issues on wefwef/voyager a long time ago , solved with a update.