The Red Ace keeps the count so you can test yourself to see if you're tracking it properly. Don't want to count? You can still play casual Blackjack for practice and fun.
Know when to make the right move (hit/stay/double/split) in any given situation. This increases your odds of winning all by itself.
Once you've mastered all the right moves and can keep the count like nobody's business, you'll be ready for Vegas!