What types of leads exist?
The most common classification is by temperature. A cold lead has barely shown interest, perhaps leaving an email in exchange for a piece of content. A warm lead interacts repeatedly, visiting the website or opening emails. A hot lead directly asks for a demo or a quote. The second classification is by origin, because a contact from an advertising campaign is not worth the same as one who visited your booth at a trade show, where the conversation already happened face to face.
The nuance between departments matters too. In marketing, a lead is anyone who leaves their details. In sales, the term is reserved for contacts that also fit the kind of company the team wants to sell to. That gap in criteria causes plenty of friction between the two teams, and shared definitions are how it gets solved.
What is the difference between a lead and a qualified lead?
The lead is the starting point and the qualified lead is the one that has passed a filter. Qualification confirms two things, that the contact’s company fits your ideal customer profile and that its interest is serious. Most leads never make that cut, and that is the point of the funnel, protecting the sales team’s time so it goes to the opportunities with real potential, usually ordered through lead scoring.
Event leads deserve a special mention, because they arrive with more signal than any other channel. Attending an industry show already demonstrates investment in the market, which is why event lead generation consistently produces some of the best-converting leads in B2B.