Pyramiding your weights is a great way to build muscle size and strength. Working up from relatively lightweight to a heavyweight over multiple sets ensures you stimulate your muscles with the right amount of volume to stimulate growth and at the right intensity to produce strength adaptations. It’s best used on compound barbell exercises, but it can be used with machines and dumbells as well.
Unfortunately, most programs don’t properly explain how to perform a pyramid correctly. I used Pyramid training when I was in high school bulking for football. I gained approximately 30 pounds of muscle during those years, despite performing them incorrectly. Like most people, I over-taxed myself on the early sets, and couldn’t progress in weight as well as I could have.