Google, Facebook and others companies keep your data on their servers indefinitely. This info can be subpoenaed by lawyers and goverments, including in civil cases like a divorce. Google had answered over 100,000 requests last year.
Governments have access to information about your political interests and affiliations. Your personal information including your photos can be made available to people who can steal your identity for purposes of theft and even for impersonating you on banks and other such sites or apps.
With the invention of facial recognition, nobody is anonymous anymore, There are apps that are able to recognize your face or make deepFake videos. Even Amazon, Google and Apple are working on this technology.
Gps is always on
Did you now that your android is always tracking your location, you can check it here, In fact all apps set up with the correct permissions can also track your location.
Your personal data remains
on their servers indefinitely.
And your searches, photos and data that you shared can be accessed by lawyers or goverments. Even China is going to have a 'pre-crime police' system in place to momitor and rate people on how trustworthy they are.
Your microphones are listening
Facebook and Google Now, has been reported for showing ads and posts that are related to spoken keywords. Even some sexToys and Smart Tvs have been spying. Snowden has disabled his microphone from his phone and he uses headphones.
Your Email are tracked
Google still has access to your emails and use your information for marketing purposes and to train their Neural Networks.
SmartHome Devices
Amazon Echo and Google Clips, are 'always on' systems. Essentially this leaves you in a place where you have less control and are left vulnurable. Your activites are under surveillance at all times.
telcos sell your data
Telcos have a lot of your personal information and they often sell it. This includes your name, location, and other information gathered from your online profile.