SharePoint is a web-based collaborative platform primarily used for building corporate intranets, document and content management, and file sharing. Developed by Microsoft, It is primarily used as part of the hosted service Microsoft 365, but it can also be hosted by an IT department or service provider, using an on premises version called "Server Edition". Launched in 2001, it was initially bundled with Windows Server as Windows SharePoint Server, then renamed to Microsoft Office SharePoint Server, and then finally renamed to SharePoint.

According to Microsoft, as of December 2020^[update], SharePoint had over 200 million users.

The most common uses of SharePoint include:

SharePoint allows storage, retrieval, searching, archiving, tracking, management, and reporting on electronic documents and records. Many of the functions in this product are designed around various legal, information management, and process requirements in organizations. SharePoint also provides search and "graph" functionality. SharePoint allows collaborative real-time editing and encrypted/information-rights-managed synchronization by providing the underlying technical infrastructure for Microsoft OneDrive.

SharePoint is often used to replace or supplement an existing corporate file server, and is typically coupled with an enterprise content management policy.

A SharePoint intranet or intranet portal is a way to centralize access to enterprise information and applications. It is a tool that helps an organization manage its internal communications, applications and information more easily. By providing the tools to capture and share explicit knowledge in an organisation, Microsoft claims organizational improvements in employee training, employee engagement, business process management, organizational communication, and crisis management. These capabilites are usually centered around "Communication sites" (previously, "Publishing sites").

SharePoint contains team collaboration groupware capabilities, including: document / file management, project scheduling (integrated with Outlook and Project), and other information tracking. This capability is centred around "team sites". Team sites are created whenever a Microsoft Teams team is created, but they are also created independently of these, and have been a feature of SharePoint since 2001.

SharePoint sites are the hosting infrastructure for OneDrive For Business, which allows storage and synchronization of an individual's personal work documents, as well as public/private file sharing of those documents.