A warning is intended to alert Android users about suspicious links in e-mails and thus protect them from fraud and data theft.
In the near future, Google wants to bring an update for Gmail customers using the corresponding Android app update. After the patch is installed, a new feature will check whether links are forwarded to suspicious websites. If the system finds dubious content, users will then receive a warning before the page opens.
Link check is supposed to bring security
It may be possible that a secure [or legit] site is perceived as a threat, said Google. The company will just give users the notice, or a warning, that they should be more secure before clicking on an unchecked link. This is simply a new security feature, which may prevent data stealing and fraud attempts.