Images that are part of the content often do better when they have a caption. And yet, a lot of web designs rely on images without any captions. With HTML5, you can use the FIGURE and FIGCAPTION elements to declare your figures and give them a caption. Do you caption your images on your web pages?
I would use captions more often, but the CMS I use doesn’t seem to have a caption option. For important charts or photos that need explanatory info I put them in line and add a bolded paragraph above as a caption. But for graphics that the text flows around I don’t know how to add a caption (I’m not an HTML programmer).
By the way, I assume that on the web it’s better to put the caption ABOVE the graphic to explain what’s coming, as opposed to below the graphic as is more common in a book or magazine. Is that a good assumption?
@Jill: I think that most people are used to captions being below images. But your design, your rules. That said, I like to put the captions below images on my sites.