Header (Sticky Ads) A sticky ad is an ad unit which stays visible on the page while the user scrolls through the content of your page. Sticky ads are a non-intrusive format that can be very effective to increase CTR and your Active View metrics. Header sticky ads  are present at the top of the webpage. They generally spread from one end to the other end of the screen in a landscape manner. Header sticky ads mostly consists of these ad sizes. Indicating that creative size will be rather small. Therefore, it is essential to fit the information to the banner so it would be well visible.   Creative Size Impressio ns 320x50 84,912,419 300x250 15,330,892 728x90 14,716,507 300x50 11,764,899 320x100 1,338,140 Additionally, almost  70% of all Header sticky ad  traffic comes from apps.  Types Impressions App 90,242,763 Site 39,314,299 While, when it comes to countries these are the  leading markets with the most traffic  for header sticky ad. Country Impressions Indonesia 37,644,822 South Africa 13,594,676 Brazil 10,513,735 United Arab Emirates 6,005,646 Jamaica 5,393,127 Thailand 4,456,940 United States 4,422,286 Malaysia 3,764,192 Russian Federation 3,491,415 Nigeria 3,487,674 Georgia 3,409,117 Canada 2,923,852 Kenya 2,452,110 Australia 2,221,265 Armenia 1,664,195 Ghana 1,517,050 Romania 1,401,335 Bangladesh 1,376,131 Vietnam 1,030,511 Sri Lanka 953,642 Global 129,557,062 Without any optimization results for Header sticky ads might be: Country Viewability CTR Nigeria 62.01% 0.16% Kazakhstan 74.07% 0.49% Kenya 59.02% 0.26% Indonesia 83.05% 2.27% Bangladesh 88.93% 4.19% Total: 75.02% 1.83% Where the split between apps and sites was rather similar.  Apps Sites 58.68% 41.32%