Scroll position Y shows how much of the webpage has been scrolled down. In our case, the "scroll position Y" field determines at what part of the page the notification will show up.
To find scroll position Y, do as follows:
1. Scroll on your page until you find the desired part of your page where you want the notification to appear.
2. Right-click and select ''Inspect'' or ''Inspect element''. 
3. Click on ''Console''. 
4. Write ''pageYOffset'' and press enter. This will give you scroll position Y.
5. Insert the number into the ''Scroll position Y'' field.