Take advantage of the ability to show a much more sophisticated visual of dashboards (than in Classic), along with the ability to customize and assign Home Pages to specific profiles. Your end users will be impressed with how great their dashboards look!
Dashboards: https://help.salesforce.com/articleView?id=dashboards_embed.htm&type=5
Home Pages: https://help.salesforce.com/articleView?id=admin_home_lex_assign.htm&type=5
