Here is the link to their official website https://metamask.io

Due to the increasing number of new crypto investors there are increasing numbers of scam Ads pointing you to a fake replica site where they can steal your assets. Read through this article as a warning on scam Ads: https://www.thesun.co.uk/money/16764487/metamask-users-loses-thousands-on-google-ad-scam/

Also, this was published today so it's still an ongoing problem: https://coingape.com/fake-metamask-wallet-fraud-rises-in-china-amid-defi-and-dex-popularity/