Now the fridge is nice and clean and tidy, today's task is to do something similar with the freezer. Let's round up all those loose peas, and get rid of those unidentified lumps of stuff. And make more space by chipping off all the ice that's built up!
Frozen stuff doesn't last forever, and will deteriorate in quality slightly over time, or suffer 'freezer burn', especially if it hasn't been wrapped properly. There's some good guidelines here as to how long to keep stuff.