Thousands of people across the country volunteer throughout all kinds of work - including sport.
"Anybody can do volunteering. When you see the volunteers that are here, everybody's different." This is what Sarah Gourlay, who worked voluntarily at the Davis Cup last month, had to say about volunteering.
BBC Get Inspired reporter Louise Andrew followed Sarah, and fellow volunteer Bobby Pollock, for day two of the Davis Cup event which was held at the Emirates Arena in Glasgow.
If you want to find out how to get involved in volunteering, visit the Get Inspired volunteering page for information.
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