If you want to limit how your personal online behavior is sold to private advertisers, here’s how to fix the settings in various places. It takes 5 minutes and is quite satisfying. 

1. Go here http://optout.aboutads.info/
2. Let it do its thing (takes a couple minutes), then click “opt out of all” at the bottom.
3. (To get all of them, you may need to periodically repeat this and click “try again.”)

1. Go here: https://www.facebook.com/ads/preferences
2. Click on “Your Information” and turn everything off (they should all be grey.)
3. Click on “Ad Settings” and choose “no” for everything.
4. You can see which advertisers’ lists you’re currently on and delete them in “your interests” and “advertisers you’ve interacted with.”

1. On your phone, go to Settings > Privacy > Advertising (it’s all the way at the bottom)
2. Turn ON “Limit Ad Tracking” (it should be green)
2a. Click “Reset Advertising Identifier…” to delete all existing advertisers’ tracking data.
3. Go to Settings > Privacy > Location Services > System Services (it’s all the way at the bottom)
4. Turn OFF “Location-Based Apple Ads” (it should be white)

1. Go to https://adssettings.google.com
2. Turn OFF “ad personalization” (is should be grey)

TWITTER (computer browser):
1. Go to https://twitter.com/settings/personalization
2. Click “Disable All”
3. IMPORTANT: click “Save Changes” at the bottom (or it won’t take effect)

TWITTER (mobile app):
1. Go to Settings and Privacy > Privacy and Safety > Personalization and data (it’s all the way at the bottom)
2. Turn is OFF (it should be white)