What is SharePoint?

Share point helps team members to connect and exchange information in a collaborative manner. It helps to centralize enterprise information for efficient functioning. For instance below is how a normal organization works. Files and documents scattered in individual PC and data is transported according to custom protocols. The communication protocol for sending these data is also person dependent. Somebody would use an email , somebody would share a drive etc. 

Share point unites all the documents in to one centralize place and unifies the data transport mechanism. In one words a central enterprise information portal.