A Super-Earth is a terrestrial type of planet, that is larger by volume and has managed to attain more mass than that of Earth.
They are currently easier to find compared to planets the size of our own. Planets that are closest to our solar system seem to be the easiest to find. Planets closest to their host stars absorb sunlight which inflates their atmosphere. As the atmosphere absorbs some of the wavelengths of light and lets others pass by, sensitive instruments can then pick up on where planets might be.