Whatever the case may be, calls - to - action must stand out from the rest of the other eLearning content of the page and prompt the learner to make a decision. (elearningindustry.com)
One benefit of this is it focuses on the main content of the page which it presents for easy reading as an article while removing the ads or extra columns. (goodereader.com)
It looks at a dozen of things beyond the actual content of the page and the terms used in it. (link-assistant.com)