Hi Rajiv,
It's likely the pop-ups you're seeing are browser push notification ads.
In Microsoft Edge, visit the following page:
edge://settings/privacy/sitePermissions/allPermissions/notifications
In the list of sites allowed to send notifications, remove any strange or unfamiliar sites (often with odd names, not sites you trust).
After cleaning, you can also turn off the option that lets sites ask to send notifications to prevent this in the future.
If that doesn't help, please post a screenshot of the pop-up you're seeing.