Advocacy aims to influence decision-making by speaking up in support of a cause or issue, or taking an action to change laws, policies, practices and attitudes.
Self-advocacy is when you take action in response to a problem that you yourself experience.
Individual or case advocacy is when you advocate on behalf of another person. For example, for a person with an intellectual disability or mental illness, or for elderly parents.
Systemic or public interest advocacy is when you take action to bring about improvements to a policy or practice, or to right a wrong that affects a group of people. For example, campaigning for changes to the aged care system, lobbying MPs about local improvements, or advising an energy company about how they can best meet the needs of older people.