What are the common SharePoint security mistakes that I need to avoid and how do I keep it locked down?

Below are some of the common SharePoint security mistakes that many organizations commit.

1. Access rights that are too broad.
2. Using default or weak passwords in their SharePoint environment.
3. Ignoring patch management.
4. Using traditional security tools to protect their data in SharePoint.

To keep your SharePoint Online environment locked down, you need a set of tools that will allow you to proactively protect against and detect breaches before it can cause damage.