Find Your Cursor Faster
Sometimes it is a pain to find your cursor on a Mac. You shake your fingers back and forth on the trackpad and it takes a good 15 seconds to figure out where the cursor is hiding. This is especially annoying on high-resolution screens and on multi-monitor setups.
When you shaker your fingers side to side on the track pad in OS X El Capitan the cursor will get bigger so you can see it easier on the screen.
This is a very small feature, but it solves an annoying problem that many users deal with every day.