You are new to this and there is a ton to learn.
Email submits work by a person submitting their email address and some times required to confirm their email address by clicking on the activation link sent to the email.
The one bad thing about email submits are they do not convert well, hence the term shave.
Basically what this means is everything that was required to complete the lead gets done but the network does not credit your account. They do this for many reasons some are so they make more money, to have some sort of quality control for the advertiser promoting the email submit and many other reasons such as it not getting tracked properly.