To put it simply, a high emissivity object is better able to radiate energy than a low emissivity object.
A blackbody would have an emissivity of 1, meaning that it would emit 100% efficiently.
Lower emissivity objects would be less efficient emitters. An object with an emissivity of 0.6 would emit 60% of the energy that a blackbody would under the same conditions.
The image above is a small piece of polished metal with a piece of PVC tape stuck at each end. The tape has an emissivity of 0.95, so it is a good emitter and emits energy well. The polished metal has a low emissivity and does not emit as well.
Is the tape the same temperature as the metal?
Yes, they are the same temperature, they just appear different.
Why does the tape look hotter
The tape has a higher emissivity, because of this it radiates more energy.