An iframe lets you put a direct view window of another page, a video, a flash game or many other things directly on your wiki-page. You can for example use it to put Youtube videos on your house, like [Stephen] normally does.
You must have a priv of 90, or lower to be able to use the iframe-tag. Note that if you let someone with a priv of 91+ edit your wikipage, the tag will no longer work and you will have to edit it again to fix it.
See privs for more information.
Additionally, to make it easier for members to directly copy and embed content (like a YouTube video, for example), the standard HTML code for iframes can also be used.
To easily grab a video from YouTube and display it on a wiki-page for display, go to the video you'd like to share on Elfpack, click on the "share" button on the page, then go to the "Embed" section and copy+paste that code on to a wiki-page, and submit changes to the page.
2013-05-22[kittykittykitty]: Are iframes disabled in houses? But not in picture descriptions?
2013-05-22[sammie h!]: I frames are for wikis, picture descriptions are under wikis so are enabled for there, but they cannot be put into houses on the description though I would highly recommend having that option. :)