Recently, researchers have analyzed the dynamics of how blogs become popular. There are essentially two measures of this: popularity through citations, as well as popularity through affiliation (i.e. blogroll). The basic conclusion from studies of the structure of blogs is that while it takes time for a blog to become popular through blogrolls, permalinks can boost popularity more quickly, and are perhaps more indicative of popularity and authority than blogrolls, since they denote that people are actually reading the blog's content and deem it valuable or noteworthy in specific cases.
The blogdex project was launched by researchers in the MIT Media Lab to crawl the web and gather data from thousands of blogs in order to investigate their social properties. It gathered this information for over 4 years, and autonomously tracked the most contagious information spreading in the blog community. The project is no longer active. Blogs are also given rankings by Technorati based on the amount of incoming links and Alexa Internet based on the web hits of Alexa Toolbar users. In August 2006, Technorati listed the most linked-to blog as that of Chinese actress Xu Jinglei and the most-read blog as group-written Boing Boing.

Gartner Group forecasts that blogging will peak in 2007, levelling off when the number of writers who maintain a personal website reaches 100 million. Gartner analysts expect that the novelty value of the medium will wear off as most people who are interested in the phenomenon have checked it out, and new bloggers will offset the number of writers who abandon their creation out of boredom. The firm estimates that there are more than 200 million former bloggers who have ceased posting to their online diaries, creating an exponential rise in the amount of dotsam and netsam (i.e. unwanted objects) on the Web. It was reported by Chinese media Xinhua that the blog of Xu Jinglei received more than 50 million page views, claiming to be the most popular blog in the world.In mid-2006, it also had the most incoming links of any blogs on the Internet.