What is the difference between anonymous leads and known leads?

[Anonymous]

Hi there,

I am new to Marketo and trying to find out how many leads we have in our database. On the "Lead Database" landing page, it shows these two different numbers: 10993 known leads and 23576 anonymous leads. I would think we have 34569 total leads then, but what are the anonymous ones?

Thanks!

[Jenn_DiMaria2]

There's loads of detail about this here in the Product Docs

[Josh_Hill13]

Anonymous = leads with a cookie and no email address

Known = email address (although in some cases you could add leads manually without an email address, but that's BAD).