Depends on who you ask.
>Some seek control
>Some seek recognition
>Some seek enlightenment
>Some seek happiness
>Some want to help others
>Some want to hurt others
>Some don't care about anything important so they'll never understand true purpose
I don't think there's one singular purpose other than to be good and create good things so others can benefit, enjoy, or grow.
Those who can fathom goals that don't involve destroying something good or hurting good people, and can achieve those goals in a lifetime seem to have the happiest lives.