A politician is an individual who is involved in politics, often as an elected representative. They work within government systems to create, amend, and implement laws and policies that affect the lives of citizens. Politicians can be found at various levels of government, from local councils to national parliaments, and they often represent specific political parties or ideologies. The role of a politician is crucial in shaping the governance of a country. They engage with the public, advocate for their constituents' needs, and participate in debates and discussions to influence decision-making. Notable politicians include figures like Barack Obama and Angela Merkel, who have made significant impacts in their respective countries.