The Retention Revenue Impact tab shows how much of your total revenue is generated by each lifecycle stage, both in absolute and % terms. In this way you can see how successful your retention marketing strategies are, based on the value of their comparative conversions. You can select the time period from the options above the charts, or drag the slider manually. Hover your mouse over a date to see the exact figures for that period.
Click the purchase type to the right of the graph to add or remove that purchase type from the graph. The displayed purchase types are shown in bold:
If you have excluded purchases made by unidentified contacts from your Strategic Dashboard and Smart Insight lifecycle reports, then your reports will not show explicitly how many contacts were excluded from your statistics, except for this report. Here you can check the number of Unidentified purchases. For more information, see Excluding unidentified purchases from your reports.

Whereas the Proportional revenue chart shows you the relative importance of your lifecycle stages, the Total revenue chart gives you a more direct overview of the growth of your business.
Use the Contact attributes to filter the charts by lifecycle stage or buyer status. In this way you can learn more about which customer types are more valuable for your business and where you should be concentrating your engagement and retention efforts.
For more information on how to update the chart, see Smart Insight Attributes.
Also, check the onboarding video about Retention Revenue Impact: