A few comments that stood out.

First, the power of threes. We seem wired to get caught up in threes, but you have 4 questions at the start. I'd remove one of them.

I didn't like the "...answers to these, and more..." since the "more" makes me think that you'll talk about stuff I might not be interested in.

I also don't like the "my goal". Doesn't seem forceful or confident enough.

My rewrite:

Did you ever wonder what happens inside SQL Server when you submit a query? Did you want to know if your indexes are getting used? Did you just need to understand why your query is running so slow? The answers to all these questions are contained within SQL Server execution plans. You will learn how to generate execution plans and then read them to understand what is happening inside SQL Server. You’ll learn the difference between an estimated and an actual execution plan and when to use each one. I will explain how to read a graphical execution plan and follow your data through the plan as it gets joined to other tables, filtered by WHERE clauses, or compiled in aggregate functions. After watching this session, you’ll understand how to get detailed information out of execution plans, what operators to watch for, and which ones will help your queries run faster.