Devolution is when a country or region is handed extra decision-making powers so it can run itself more independently.
If an area is devolved, it remains under the overall control of a central government. However, it has freedom to make some of its own decisions.
For example, the Scottish Parliament and Scottish Government make their own decisions on things like hospitals, schools, housing and the police and fire services. Matters that aren’t devolved like benefits and immigration remain controlled by the UK Parliament and UK Government in London.