Keyword placement on the page
There is some evidence that placing your keywords near the top and left edges of the page will (slightly) benefit your overall ranking, because, on average, those areas of pages are the most likely to contain important content keywords. The top and left edges also fall within the heaviest reader scanning zones as measured by eye-tracking research, so there are human interface advantages to getting your keywords into this page zone, too. For optimal headings, try to use your keywords early in the heading language. Search crawlers may not always scan the full text of very long web pages, so if you have important content near the bottom of long pages, consider creating a page content menu near the top of the page. This will help readers of long pages and will give you an opportunity to use keywords near the page top that might otherwise be buried at the bottom (fig. 5.9)