Prevent Banners from "Blocking".
Discussion
Web browsers traditionally loaded HTML content "synchronously" - that is, the entire HTML page was loaded first, so that the browser could lay out all the content, and then other elements (such as images) were loaded after the HTML was parsed and laid out.
However, this means that when calling external sources to add in HTML content at load time (i.e. adding some Revive Adserver tags to a page), the browser needs to fetch the HTML for that content - all such content - before the page can be loaded. If the external source takes a while to load, and/or if there are many such external sources to load, this can result in very poor page load times - the external content "blocks" the main content from being loaded.
There are a few ways that Revive Adserver can be used to prevent banners from "blocking" the loading of the main site content.
HOWTO
Option 1: Use the Asynchronous or iFrame Tags
Probably the easiest way to prevent Revive Adserver banners from blocking the loading of website content is to use one of the two zone invocation tags that natively load asynchronously - the Asynchronous JS Tag and iFrame Tag.
These two zone level invocation tags are simple to use - simply generate the tag(s) for the zone(s) you want to display banners for, and put the tags into your HTML content where you want the banners to appear. That's it - the banners will be loaded asynchronously.
Option 2: Use the Single Page Call Tag
Technically, the Single Page Call tag is not