Google Adsense is the #1 site to make unlimited money through your website and blogs. Adsense team now introduces 300 x 600 largest ad unit size for users to earn more. If you are a blogger or website owners add this new ad unit to get better CTR, it makes you earn more.
Google Adsense team says:
The 300x600 unit, sometimes referred to as a half page unit, provides a larger space for advertisers to get their message across and can offer users rich engagement. As mentioned in our recently released Display Business Trends, the 300x600 is one of the fastest growing sizes by impressions and is indicative of a trend where publishers are offering more visually impactful ad sizes that are preferred by brand advertisers. Because this unit is new to our network, you’ll currently see a large number of text ads in these placements. Over time we’ll continue to build a wide range of text and display ad inventory eligible to appear in this full slot as well.
To add 300 x 600 ad unit to your site sign in to your adsense account click on My Ads then click "New ad unit" button. Select banner size as 300 x 600 Large Skyscraper then modify for suite to your site finally click on "Save and get code" button. Copy the code and save it your blog or website.