Good news for adsense publisher...this Ad units is the largest 300 x 600 size skyscraper ever that will surely increase your overall AdSense earning by increasing the click through rate (CTR) of all your pages.
The 300 x 600 skyscraper ad unit, also knows as a half-page unit, goes into the 'larger' category, and offers a larger space to advertisers to advertise their content..so this is the so popular ad unit for increasing your Click through rate (CTR) and increasing your ad unit.
Use this Latest ad units to your website for maximize earning
How to add 300 x 600 ad units to your website or blog ?Login with your password to adsense login page
go to create new ad
select 300 x 600 ad unit (see below image)
save and get code.........