Is this Necessary?

So I went to a Valvoline for a oil change and when I got there they recommended that I should get these done. I’ve had a full service done before at a dealership and I’ve not even heard of doing these things. They do sound important so I was just wanting to get the opinions of others. My vehicle is a Chevy Silverado 1500 V8 5.3 High Country with 47,147 miles.