A push notification is a way for an app to send you a message or to notify you without you actually opening the app. The notification is pushed to you without you needing to do anything. You can think of it like the app sending you a text message, although notifications can take on several different forms. One common push notification takes the form of a red circle with a number in it that appears on the corner of the app's icon.
This is the main step that you need to take for creating new instance in installed SQL Server 2008 R2. Select option Named Instance from the given option and provide the name as per your wish for new Instance. In my case i have given name as MYSQL and clicked Next button.
An instance is either the default, unnamed instance, or it is a named instance. When SQL Server 2005 is in installed in the default instance, it does not require a client to specify the name of the instance to make a connection. The client only has to know the server name. A named instance is identified by the network name of the computer plus the instance name that you specify during installation. The client must specify both the server name and the instance name when connecting. By default, SQL Server installs in the default instance unless you specify an instance name. SQL Server Express, however, always installs in a named instance unless you force a default installation during setup. According to Microsoft regarding named vs default.