Do I need Mac Clean Up utilities and which can be trusted?

Popups

1. Click  menu in the menu bar, hold the  shift key on the keyboard down

and choose “Force Quit Safari” from the dropdown.

    Safari will quit.

    Launch Safari holding the shift key down.

For more info:

Section:  Pop-ups and ads in Safari: https://support.apple.com/en-us/HT203987

 2. Remove Adware

     Run  the latest release of Malwarebytes for Mac to remove malware/adware, if installed on your Mac.

     For instructions:  Install Malwarebytes for Mac v4   Uninstall Malwarebytes for Mac

     Click the “Scan Now” button. Once done, quit Malwarebytes for Mac.

     Restart the computer and relaunch Safari holding the shift key down.

     Repeat the scan couple of times.

Malwarebytes for Mac app and EtreCheck are developed by a members of Apple Support Communities

and are very much trusted.

  Additional steps to take if necessary (1) 

  1. Remove unknown extensions:  Safari > Preferences > Extensions

      https://support.apple.com/guide/safari/use-safari-extensions-sfri32508/mac

  2. Reset search engine:    https://support.apple.com/guide/safari/customize-your-search-ibrwe75c2a3c/mac

  3. Reset  Homepage.   https://support.apple.com/guide/safari/set-your-homepage-ibrw1020/mac 

  4. Restart your Mac. Relaunch Safari holding the Shift key down.      

3.  If this doesn’t help:

     Download EtreCheck: https://etrecheck.com/ run it and post the report here.

     Click  “Click to download” button,    

     Open Downloads folder, click on it to open, and then select ”Open”.

     “Choose a problem” from the popup menu box, and then “Start EtreCheck” in the dialog.

     Click “Share Report” button in the toolbar, select “Copy report” .

     Paste the report when you reply.