Intent signals and the tracking snippet
The snippet records page views, form submits and custom events (optline.track('custom', '/demo-video')) only for visitors who have identified themselves through one of your opt-in forms or a tracked email link. Anonymous visitors are not tracked.
Only the URL path is stored, never the query string (query strings often contain personal data). Browsers that send Global Privacy Control or Do Not Track are not tracked. No cookies are set; the identifier is kept in your site's localStorage.
Email link clicks: on a lead's page, build a tracked link for any URL. When the lead clicks it in an email you send, the click is recorded and they are redirected to the destination. Server systems can also post events through the API.