There are a lot of different movements and exercises you can do with a Kettlebell, but the most basic one is the Kettlebell Swing. This movement has a lot of benefits: it is a great fat burner, it works your posterior chain, and it is a good exercise for Tabata Intervals. Personally, I use this exercise on my Saturday fun day. I like it because it is great for working the hip flexors and providing explosion to running and sprinting that I do.
The video below is a great tutorial on how to do the movement. As she mentions, all of the power should be coming from your hips; your arms should basically just be “straps” for the kettlebell to swing with. So you’re not lifting with your arms, but creating the movement with the pop in your hips.