Hello, @jmarkoll
Velocity, as a template language, provides the means (methods) to influence and determine what content gets displayed on a page. So, your interpretation of “it uses to control what you display” aligns with the intended meaning.
The original sentence is:
“Which means it control what you display.”
You’ve raised a valid point. It appears there’s a grammatical error in the sentence. It should indeed read:
“Which means it controls what you display.”
( control → controls)
So your understanding is correct. The sentence should convey that Velocity is a template language that controls what is displayed on your page.