Why admirals often commanded from cruisers

Why were cruisers often used as command ships?

They offered the necessary staff and communications spaces close to the action without the size and main-battery blast of a battleship.

Cruisers combined several practical advantages as command ships. They could operate close enough to the objective while remaining less unwieldy than a battleship. A battleship's main battery could shake radios and staff spaces at exactly the moment an admiral needed them to function. Cruisers also carried flagship quarters, headquarters accommodation, and communications, with HMS Belfast providing a surviving example.