What is SharePoint? (And How to Use it Properly)

That "S" Icon in Your App Launcher

Quick answer

SharePoint is Microsoft 365's cloud platform for storing, organizing, and collaborating on your company's shared files and team sites. It acts as the modern replacement for the old shared "S:\" file server, adding real-time co-authoring, version history, powerful search, and granular permissions, and it is the file backend behind every Microsoft Teams channel.

If you use Microsoft 365, you've seen it. That green "S" icon labeled "SharePoint." Most users either ignore it or are confused by it. "Isn't that just for... 'intranets'?" "Don't I just use OneDrive?"

This confusion is the #1 reason businesses fail to get the most out of their M365 subscription. Let's clear it up. SharePoint is the new "File Server" for your entire company.

The Most Confusing Part: SharePoint vs. OneDrive

This is the key. You have to understand the difference:

OneDrive is for YOU. Think of it as your new "My Documents" folder. It's your personal work-files, stored in the cloud. You own it. You can share files from it, but by default, they are private to you.
SharePoint is for US. Think of it as your new "Shared Drive" (like the old "S:\" drive). It's the central, company-owned location for team files. It's where you store documents related to a department or a project.

Here's the kicker: When you save a file to a "Channel" in Microsoft Teams, you are actually saving it to a SharePoint site that is connected to that Team. Teams is just the "chat" interface; SharePoint is the "file" backend.

How SharePoint Replaces Your Old File Server

That old, clunky "S:\" drive in your office was just a big folder. SharePoint is a "smart" folder with superpowers. Here's what it can do that your old server couldn't:

Use case	What it enables
Document management	A central, cloud-based home for team and department files that replaces the old shared drive, accessible securely from anywhere.
Team & intranet sites	Dedicated sites per department or project, including the SharePoint site that sits behind every Microsoft Teams channel.
Real-time co-authoring	Multiple people editing the same Word or Excel file at once, ending emailed copies and "Version 2 vs. Version 3" merges.
Version history	Automatic saved versions of every document so you can restore an earlier copy after an accidental change or deletion.
Permissions & governance	Granular control over who can access each site and document library, keeping sensitive data such as Finance files restricted.

1. Access From Anywhere (Securely)

Because your files are in the cloud, you can securely access them from any device, anywhere. You don't need a clunky, slow VPN. You just log in to M365. This is what enables true remote and hybrid work.

2. Co-Authoring (Real-Time Collaboration)

This is a game-changer. Ever had to "check out" a file, or email an Excel sheet around and then try to merge "Version 2" and "Version 3"? It's a nightmare.

With files in SharePoint, multiple people can be in the same Word or Excel file at the same time, making changes and seeing each other's work. No more versions. Just one "live" document.

3. Automatic Version History

What if someone makes a mistake and deletes a critical paragraph? Your old server couldn't help. SharePoint, however, is automatically saving versions of your document in the background.

You can right-click any file and look at its "Version History" and restore a previous version from an hour ago, or from last Tuesday. It's like a built-in time machine for every file.

4. Powerful Search

Trying to find a file on your old server was a nightmare. You had to know exactly what folder it was in.

SharePoint's search is powerful. It searches not just the file names, but the full text inside every document (Word, Excel, PDF). You can instantly find any document, no matter where it's saved.

5. Granular Security

On your old server, you had "folders." In SharePoint, you have "Sites" and "Document Libraries" with much more granular security. You can create a "Finance" site that only the Finance team can access, and an "Operations" site for everyone. It's far more secure and organized.

How to Use It Right: A Simple Plan

Don't just "dump" your old S: drive into one giant SharePoint site. You'll have a "cloud-based mess" instead of a "local mess."

The right way to migrate is to use this as an opportunity to re-organize:

For each Department (Finance, Sales, HR): Create a private Microsoft Team. This automatically creates a SharePoint site for that department's secure files.
For Company-Wide Files (Templates, Policies, Marketing): Create a "company-wide" SharePoint site (or Team) that everyone can access.
For Your Personal Files: Use OneDrive.

This "Teams-first" structure is the modern, organized, and secure way to manage your company's data. SharePoint isn't just an "intranet" anymore; it's the core of your company's collaborative file system.