Phishing is a term to describe thieves who try to masquerade as a reputable company (or person) to get you to reveal personal info, such as a credit card number or password. They may place an order on terms with the hope that the product will be shipped to them and they'll skip off payment.
Google is the undisputed leader of search, with approximately 75% of the world's searches going through their engine.
So, Google knows a lot about you... really, a lot.
Facebook messaging swiped a play from WhatsApp when they offered Secret Conversations in 2016. Since then, several apps have introduced secure messaging promising end-to-end encryption.