In a recent article in the Wall Street Journal, reporter Joanna Stern sketched out a simple and prudent step to protect your privacy online.
You might not be aware that your web searches might “follow” you across other sites, such as Facebook, which can use your search history to target advertising.
In the Facebook iOS or Android app, tap the three lines in the bottom-right corner, select Settings > Account Settings > Ads.
Tap “Can you see online interest-based ads from Facebook?” and then “Off.”
This will turn off the setting across your Facebook account—on all your devices.