The Contributions and Investment Returns chart on the Insights page shows you projections of contributions and investment account balances over the course of your plan.
There are many types of activities that may display on this chart:
Real Estate Investments - Gains from real estate sales modeled in My Plan > Home and Real Estate
Returns - Gains from investment growth by account based on growth assumptions entered My Plan > Savings and Assets and the amount of interest paid toward debts modeled in My Plan > Debts (this is a negative return)
Monthly Savings - Monthly contributions to savings accounts modeled in your plan
Excess Income - Income in excess of savings contributions goals and expenses that are designated to an account in My Plan > Work and Other Income
What should I look for?
Notice which years are taller than others.
Notice how each account grows over time. Which accounts grow the fastest?
See how the chart changes if you change your plan assumptions from optimistic to pessimistic
See how the chart changes if you update something in your plan, such as account growth rates