How do you do it currently? What challenges do you face? What tools do you use and how does your sales/marketing team qualify these leads - do you track their website behavior?
All visitors start out anonymous to you, so you identify potential leads by trying to engage them, getting their name and email or phone number. Usual techniques: invite to chat, request more information, request contact, sign up for newsletter, etc. Until you get contact information you can't call them leads or qualify them, they remain anonymous website traffic.<p>You can automate all of the ways to funnel and convert visitors to leads, so you try with every visitor. Maybe your code waits for 30 seconds on the site, or a click into an internal page. You have to experiment, finding the line between annoying visitors with pop-ups and forms to fill out, and getting actionable sales information.