Why Do Some of The Leads On My Lead Dashboard Have Images Or Additional Information But Others Don't?

LeadQuizzes utilizes a third party service called Gravatar, https://en.gravatar.com/, which pulls in additional information for your leads. If your leads have a Gravatar created (most create when they create a WordPress site) then you will get this additional information, if they do not have one created then you will not see this additional information.