The portfolio overview tab shows your entire portfolio of stocks, ETFs, and mutual funds. View the overall portfolio for Total Value, Dollars Invested, Day's ($) Change, Day's (%) Change, Unrealized Gain/Loss ($), and Total Return (%). Additionally, view the individual metrics for each holding in your portfolio.

This is what the portfolio page looks like when you have no portfolio created. Click the "Add Portfolio" button. to start tracking.

This is what a portfolio with no stocks looks like. You need to add stocks/funds with the "Update Auto Link", "Add Investment", and "Bulk Upload" buttons. These are explained across multiple help articles.