Flickering a permanent means to exile it and then immediately return it back to the battlefield. Bouncing is to return it back to your hand. These are your main staples of those mechanics. You can build a perfectly fine white-blue deck that doesn't utilize these cards, but they're definitely the pieces that allow this color combination to really shine. You'll notice that four of those cards are common and the last two uncommon, meaning you should not have a hard time getting at least a few of these if drafting this archetype. What are they good with? Let's take a look at some of the regular commons and uncommons that synergize with bounce and flicker.

Most frequently you'll be creating extra Servo or Thopter tokens, or perhaps giving +1/+1 counters, but often that's all the extra value you'll need when these creatures are already good by themselves. The dream is to bounce or flicker a Cloudblazer for extra cards and life, but this doesn't even take into consideration the fact that you can also blink and bounce all the creatures that produce energy to get even more value.