It's Adware...
The free Malwarebytes which may take care of it...
https://www.malwarebytes.com/mac/
To remove a configuration profile in macOS:
- From the Apple menu, select System Preferences....
- From the View menu in System Preferences, select Profiles.Note:
- Profiles won't be visible until you have at least one profile installed.
- Select the profile you want to remove, and then press the - (minus) button. Click Remove to remove the profile.
Or...
EtreCheck is a simple little app to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac.
http://www.etresoft.com/etrecheck
Pastebin is a good place to paste the whole report if you capture the URL while there…
https://pastebin.com/