Think of it in terms of a waxed car. When it rains, the water forms beads which roll off the surface. In these instances, the car is exhibiting low surface energy characteristics.
Contrast that with an unwaxed car. On this surface the water forms puddles. It ‘wets out’ because of the high surface energy.
Most bonding adhesives perform best when they are able to wet out (i.e. when they are applied to high surface energy materials), although NovaBond SignFix LSE 80 is specifically formulated for low surface energy applications.