Advocacy meaning

the profession or work of a legal advocate.

public support for or recommendation of a particular cause or policy

Advocacy is an activity by an individual or group that aims to influence decisions within political, economic, and social institutions.

Old French from medieval Latin advocatia, from advocare ‘summon, call to one's aid

getting support from another person to help you express your views and wishes.

Ex. "his outspoken advocacy of the agreement has won no friends"