Questions related to causing a spacecraft to slow down by flying through a planet's atmosphere to produce aerodynamic drag.

From Wikipedia:

Aerobraking is a spaceflight maneuver that reduces the high point of an elliptical orbit (apoapsis) by flying the vehicle through the atmosphere at the low point of the orbit (periapsis). The resulting drag slows the spacecraft.

All questions related to aerobraking should use this tag. For example, this tag has been used for questions related to methods, complications, and advantages of aerobraking.

Additional resources:

What is aerobraking?