The announcement of Google Fiber’s growth ambitions comes at a time when the company and the tech sector as a whole are tightening their belts. The corporation imposed a two-week hiring hold last month as it examined its personnel requirements, making it the latest digital behemoth to take stock amid a deteriorating economic environment. In recent years, Alphabet has also been more prepared to shut down experimental ventures. It shut down its balloon internet provider Loon last year, and its energy kite business will close in 2020.