If there's an Earth-like world that passes in front of its parent star relative to our line-of-sight, TESS will reveal it. By looking at a few of these discoveries in detail, we can appreciate what phenomenal science TESS can deliver to us. The first confirmed planet was Pi Mensae c, which orbits a star very similar to our own. Way back in 2001, a large planet had been discovered perturbing the orbit of Pi Mensae: Pi Mensae b. The ultimate goal of TESS is to find possible Earth-like worlds, and star systems which may house rocky, potentially habitable worlds.

Source: Forbes January 10, 2019 15:00 UTC