How can I serve a personalized modal to a first time web visitor?

Often you may want to personalize a user's experience on their very first page visit to your website, before they have a Lytics cookie id and user profile created in our system. To support this, Lytics can utilize the Javascript tag blockload setting to return a version of the user profile including audience membership that has some data associated with it based on what information would be sent at the time of the first page load. This will require no development work on your end.