I just stumbled across this article about the importance of an online presence. It is aimed at journalists, but there are several useful tips which also directly apply to artists, and a few which can be adapted.
The first tip – Make sure you can be found online – is particularly true, especially if you don’t have an unusual surname. To paraphrase it: “I reckon every (artist) needs to be found when someone types in their name and the word (artist).” Just as an experiment, I typed in “John Smith” and turned up over 21 million results in Google, whereas “john smith sculptor” produced just 4.