It is very important to know when a new lead comes into your system. You'll be able to stay on top of your game if you know that piece of information. Lead Notifications will help you plan out. You have the option to receive either an email and/or SMS notification for the lead alert. 

You can set this up by going through your profile on the top right corner > Settings > Integrations then simply tick the email and/or the SMS lead notification option and you should automatically be alerted one a new lead assigned to you comes in.