What do the Icons in the navigation bar mean?

Dashboard : Always brings you back to the home page.
Projects : Where to view all current projects and create a new project.
Inventory : Where to review inventory. Add inventory and access Inventory Dashboard and Warehouse reports.
Accounts : Where to review existing accounts, and add accounts.
Chat : Access to user wide chat function.
Notification (Bell icon) : Notifies of changes in status of projects.
Menu (three bar icon) : opens dropdown to provide access to functions.