If you have a particular page/post that you would like to not have the Grow widget on, you have the ability to place some code in your HTML of the page/post that will disable it from showing.
Something important to note is that, using the code will disable ALL of the Grow widgets. This includes the main Grow widget, Spotlight Subscribe, and any Recommended Content placements that you have enabled.
To access the disable code, navigate to your Mediavine Dashboard > Settings > Grow (beta) then scroll to the Placement section:
Copy and paste the Disable Widget into the HTML of your page/post, save and you're all set.