Sites with iFrame

[Rajesh Menon]

How do you optimize a site that uses iFrames in most of the webpage area, given that iFrames are not easy to crawl and can cause problems for search engines?

[Katherine Parke]

How do you optimize a site that uses iFrames in most of the webpage area, given that iFrames are not easy to crawl and can cause problems for search engines?

Generally speaking… don’t use iFrames!
Not only are iFrames a problem from content crawling standpoint, they can also slow down page loading time.
If you must, use them sparingly (e.g., to display a video, form, or button). Google can still evaluate the page based on the surrounding content, and Google does partially crawl and index content within iFrames.
Depending on what you want to do, look for alternatives.