The most common advertisement specification is 468*60. Now we can see a wide variety of advertisement specifications. In the past, the largest specification was Google AdSense, so it became a model that the advertising alliance followed. Now it seems that the highest specification is Baidu alliance.
Baidu alliance has the most advertisement specifications, but also the most outstanding. At the same time, many options have been added to the topic promotion. This is some of the recent great progress in promotion of the Baidu alliance, especially the Baidu topic, but Google AdSense is relatively lagging behind in the same field.
Of course, Google AdSense's ad specifications are also increasing, although the increase is far less than the hundred degrees alliance. The biggest problem with Google AdSense is the processing of advertising details. Unlike Baidu's flexibility and diversity, Google AdSense has a single specification, especially in terms of fonts and sizes, currently, the dominant English font has put Google AdSense behind other advertising alliances.
Later, Alimama was even more excited. Not long ago, many advertisement types were added, but in general they are still following the path of Google AdSense.
For publishers, I think most advertising alliances lack a specification, that is, customization. In my opinion, Yahoo bidding can be customized. The old code promoted by Baidu alliance seems to have this option, but the new code is no longer supported.
Custom Ad specifications may be difficult for ad alliances. However, if a good ad alliance supports custom ad specifications, it will have a high level of support in the publisher group. After all, for webmasters, site coordination is the first.