This condition is primarily used in conjunction with an automation observing Lead › Created. The web lead condition states the automation can only run if the lead came in via your contact form (rather than a lead you manually entered in Táve).

To do this you'll add a condition observing the job.web_lead token and set the value to must be TRUE:

Here's a simple automation to set up an Out of Office auto-responder to all new leads coming in via the contact form (i.e. web leads):

This automation is observing Lead › Created, has a condition that states it can only run for web leads (job.web_lead must be TRUE), then an action set up to send out an Out of Office Notice email. You can set this automation up and enable/disable it as needed.