Coach Kelton and the other CW coaches always try to teach and convey the importance of a good 'catch' of the water in freestyle and all strokes.  Here are links to a couple of great videos of examples of the catch.  This first one is from USA Swimming and there is some text with it explaining what you are seeing. 

USA Swimming example [ CLICK HERE]

The next example is a YouTube video of a Chinese swimmer, Sun Yang, who was one of only 2 swimmers (Ryan Lochte was the other) to break a world record at last year's World Championships.  Note that his catch is almost at a right (90 degree angle) which is ideal

Sun Yang example [CLICK HERE]

These are great example to copy.