From VASP Wiki

The OUTCAR file gives detailed output of a VASP run, including:

  • A summary of the used input parameters.
  • Information about the electronic steps, KS-eigenvalues.
  • Stress tensors.
  • Forces on the atoms.
  • Local charges and magnetic moments.
  • Dielectric properties
  • The amount of output written onto the OUTCAR file can be chosen by modifying the NWRITE tag in the INCAR file.