Why popup may be annoying, it can be done to impact both the revenue generation and the life of the users. Website owners, advertisers and publishers must find a way to ensure this.

Popup should be timed, brief and concise and be a message that will impact. Also, the page must be easy to close and not placed in a strategic place where users won't be inconvenient with it.

What are other ways pop-up can be made effective?