an intranet user's personal site
My Site is a hub where you can network with your colleagues and track information you are interested in. You can see a News feed of your colleague’s activities, keep track of content you and your colleagues have tagged, and share status updates.My Site is a personal site that gives you a central location to manage and store your documents, content, links, and contacts. My Site serves as a point of contact for other users in your organization to find information about you and your skills and interests. Content providers can use My Site as a method of customizing the information they present to users.
You can read more about my sites in SharePoint, here.