To track and analyze trends in SharePoint usage, use the Microsoft 365 admin center at portal.office.com. Navigate to the Reports section and select Usage to access detailed analytics. Here, you can view metrics like active sites, storage usage, file activity, and user engagement. For deeper insights, leverage Power BI with the Microsoft 365 Usage Analytics template. It provides interactive dashboards to visualize trends over time. Additionally, configure site usage reports directly in SharePoint to monitor individual site performance, including page views and unique visitors. Regularly analyzing these trends helps optimize content, enhance user experience, and drive SharePoint adoption effectively.