Meaning: Your brake pads consist of a friction material that's held onto a metal backing plate with special adhesives. Unfortunately, those adhesives also make the friction material less effective when the pads are brand new. That's why you need to bed them in. Bedding in brake pads simply involves using them in normal situations to burn off the remnants of the adhesive. Once you do, you'll notice that your brakes grab a whole lot better than they did when you first put those pads on. Check the brake pad manufacturer's instructions for bedding in your pads.