This has been around for a long while, but is what generated the idea for this category (whilst in the pub) so I thought I’d include it first, back in October 2005 Google introduced Section Targeting, here’s the Adsense Help Center page for Section Targeting.

The HTML tags to emphasize a page section take the following format:

<!– google_ad_section_start –>
<!– google_ad_section_end –>

You can also designate sections you’d like to have ignored by adding a (weight=ignore) to the starting tag:

<!– google_ad_section_start(weight=ignore) –>

This allows you to specify which parts of the page your ads are targeted to, it’s great for excluding menu’s and footers to make sure that your ads are targeted purely to the content of the page.