Okay kiddo, so a high school survey of student engagement is kinda like when your teacher asks you what you think about class or school. It's a way to figure out if students are happy and involved in school or if there are things that could be better.
The survey asks questions about how much you talk to your teacher or friends, if you feel safe at school, if you like your classes, and lots of other things. By answering these questions honestly, students can help school staff make decisions about how to make school a better place for everyone.
So, basically, the survey helps the grown-ups in charge understand how students are doing and what they need to do to help them succeed. It's kind of like a check-up for the school to make sure everything is going well and everyone is doing their best!