If it’s your first time using the Data Quality module, you must first execute a Data Consistency Analysis. This will allow you to check how many e-mails are duplicates within your database and how many are empty.
To perform the data consistency check just click on “Data Consistency Report” and then click on “Launch New Data Consistency Analysis”. You can choose to stay during this analysis or leave this page, which will be automatically updated when the activity is finished.
You can perform more Data Consistency checks as time goes by and new leads are added.