SBA Communications owns and operates wireless communication towers, leasing space on its towers to wireless carriers who mount antennas and equipment needed to provide cellular service. As a real estate investment trust, the company distributes most of its taxable income to shareholders as dividends, generating revenue from long-term lease agreements with wireless carriers who need tower space to operate their networks. Its tower business benefits from multi-tenant leasing, where several different wireless carriers can lease space on the same physical tower structure, letting SBA generate multiple revenue streams from a single tower asset. SBA Communications' growth is tied to wireless carriers' network investment and expansion needs, including the ongoing buildout of newer wireless technologies that often require additional tower-mounted equipment and capacity beyond what earlier network generations needed.