In this episode of BJJ Submission Chain Gabriel 'Gladiator' Santos shows us his favorite progression of side control attacks. Submission Chains are important because as you train and compete against more skilled opponents it's unlikely your first attack will be successful. A Submission Chain uses one or more attacks to force your opponent to react in a predictable way. You then have an attack that takes advantage of that predicted movement.
At the highest levels Submission Chains might be 5-6 or even more moves deep with variations for every reaction an opponent might make.
In the video below you can see Gabriel using many of the same techniques. This fight is from 2007, he has refined some of his options since then, and added some new attacks as well.