Events can help you mark any turning points in your SEO or marketing campaign, important changes in your industry or niche. You can also use events to keep records of the most important changes in your link-building campaign to be able to track down how they have influenced your website progress.
To create an Event, open the Preferences > Events menu. Click Add to create a new event. Then specify the date and give a brief description.
You may create 2 types of events:
Edit / Delete existing Events on-hover, or enable / disable any.