Board Thread:Support Requests - Getting Technical/@comment-4970747-20180721085910/@comment-168424-20180723015234

In short, yes. The more specific the caption to the subject of the image the more likely someone looking for images related to the subject will find them early.

That said, captions are one of a few important factors. Having fast-loading, high quality images that work where they're being presented is just as important. I prefer JPGs unless the transparency is needed and then I use PNGs. I only use GIFs for small images that don't need to be high quality. I've noticed people tend to over-use PNGs and GIFs.