Jolie is as pretty as its literal meaning; nowadays it is also seen as a woman's name, via Angelina for whom Jolie was originally her middle name.
Although it is French, Jolie is rarely if ever used as a name in France. In the US, it appeared briefly on the Top 1000 list in the seventies, then returned in 2000, following Ms. Jolie's 1999 Oscar win for Girl, Interrupted. It has, however, suffered from the whims of Hollywood-associated popularity, falling around 200 places since 2008.
The name Joely, as in actresses Joely Richardson and Joely Fisher, is unrelated and pronounced differently. A nice association is the iconic Picasso painting, Ma Jolie.