For example, Google can use the phone number to challenge people if they try to break into your account, and send you a verification code so you can get into your account if you ever lose access.
Kwa mfano, Google inaweza kutumia nambari ya simu kuwapa watu changamoto iwapo watajaribu kuvamia akaunti yako, na kukutumia msimbo wa kuthibitisha ili uweze kuingia kwenye akaunti yako iwapo hutakuwa na uwezo wa kuifikia.