There is no absolute good or bad omen when dreaming of cats; rather, it depends on the specific context and the dreamer's individual circumstances.
Generally speaking, dreaming of cats may represent some positive energy, such as:
Dreaming of a cat jumping on you may mean that you will receive good luck, happiness, or achieve a certain goal.
Dreaming of a group of cats may indicate that your career or life will usher in prosperity and good fortune.
Dreaming of cats playing or moving around happily may indicate that you are in a good mood recently, or that you will encounter some pleasant things.
However, dreaming of cats can also represent some negative or unfavorable energies, such as:

Dreaming of a dead or injured cat may indicate that you will encounter some setbacks or misfortunes.
Dreaming of a cat in the dark or in a shady corner may indicate that you are experiencing some difficulties or anxieties.
In general, the specific meaning of dreaming about cats depends on the dream and the dreamer's actual situation. If the dream makes you feel uneasy or confused, try writing down your feelings and the situation, and look for positive ways to cope.