You probably should not use jQuery unless you have an actual need for it. 10-ish years ago it was helpful because browser features were very fragmented at the time and it was hard to write code that would correctly function across all major browsers. Today, there's little difference (mostly due to them all being the same under-the-hood nowadays) so instead of being a helpful tool, it's being overused for numerous reasons. Most of what jQuery was really good at has now been added to Javascript core or there is a browser API for it.