Dynamic stretching is a good way of joint warmup. Static stretching doesn't really warm up the joints and is not proven to reduce injury during workouts.
Now, if you have mobility issues obviously you may need to address this with flexibility or mobility work. Like I said in the article to perform exercises with good technique they may need to stretch at the expensive of a small amount of strength/power output.
On the other hand, if you don't need to do this then do your joint/mobility warmups. Then static stretch after if you're getting tight.
There's nothing that hard about I don't think? If you're still confused uhh ask your Q a diferent way?