Toggle Allow Apps to Request to Track OFF

If it is on (green), you will be given the choice to allow an app to track you. If it is off (gray), no app will ask or track you. If you don't want apps to track you, the first screenshot (off - gray) is the right shot.

Is the default to deny tracking green ?

I want to block tracking, Should the button be green or left blank ?

I find that setting to be very confusing ?

All other settings on iPhone follow a different pattern.

I can't seem to find a find information that simplifies this.

Some blogs seem to suggest leave it blank, others have the green setting.

If I want to block ads what setting should I use ?

Yes, the default is to deny tracking.

It's unfortunate you've been given conflicting answers. I have given you the correct information.

Thank you all very much i'm not confused anymore :)