Website interaction data not reflecting in MongoDB

Recently I was stuck in one issue where my website interaction & contact data was not reflecting in MongoDB.  There are few points where you can do the fix for this.

1. Check you have added "<sc:VisitorIdentification ID="VisitorIdentification1" runat="server" />" this control or not on your layout.

2. In Sitecore.Analytics.Tracking.config file add your host name in value section.
<setting name="Analytics.ClusterName" value="YOUR HOST NAME" />

3. In Sitecore.Analytics.Tracking.config file add your host name in value section.
<setting name="Analytics.HostName" value="" />