Their main goal is to generate advertising revenue by attracting reader page views, as first exposed in the context of social spam.

Articles in content farms have been found to contain identical passages across several media sources, leading to questions about the site's placing SEO goals over factual relevance. Proponents of content farms claim that from a business perspective, traditional journalism is inefficient. Content farms often commission their writer's work based on analysis of search engine queries that proponents represent as "true market demand", a feature that traditional journalism purportedly lacks.

Characteristics of Content Farm or Content Mill

Some sites labeled as content farms may contain many articles and have been valued at millions of dollars. In 2009, Wired magazine wrote that, according to founder and CEO Richard Rosenblatt of Demand Media (which includes eHow), "by next summer, Demand will be publishing one million items a month, the equivalent of four English-language Wikipedias a year. Another site, Associated Content, was purchased in May 2010 by Yahoo! for $90 million. However, this new website, which was renamed Yahoo! Voices, was shut down in 2014.

Pay scales for content are low compared to traditional salaries received by writers. One company compensated writers at a rate of $3.50 per article. Such rates are substantially lower than a typical writer might receive working for mainstream online publications; however, some content farm contributors produce many articles per day and may earn enough for a living. It has been observed that content writers are mostly women with children, English majors, or journalism students seeking supplemental income while working at home.

Since the emergence and popularity of large language models, content farms have started using the tools to automatically generate content without any need for human authors.

AI tools make it easy to fill up sites with massive amounts of content. When quality is not an issue, programs like ChatGPT produce articles at an unprecedented rate. Google Ads provides 90% of the advertisements alongside this content, as large internet companies are willing to sustain this sort of business model.

With a rise in these AI tools, AI-scribed content farms are on the rise which spews robot-written content to generate ad money.

Criticism of Content Farm or Content Mill

Critics allege that content farms provide relatively low-quality content and that they maximize profit by producing "just good enough" material rather than high-quality articles. Articles that are written by human authors (rather than by automated techniques) are often not written by a specialist in the subjects reported. Some authors working for sites identified as content farms have admitted to knowing little about the fields on which they report.

Search engines see content farms as a problem, as they tend to bring the user to less relevant and lower quality results of the search. The reduced quality and rapid creation of articles on such sites have drawn comparisons to the fast food industry and pollution:

Information consumers end up with less relevant or valuable resources. Producers of relevant resources receive less cash as a reward (lower click-through rate) while produce of junk receive more cash. One way to describe this is pollution. Virtual junk pollutes the Web environment by adding noise. Everybody but the polluters pay a price for web pollution: search engines work less well, users waste precious time and attention on junk sites, and honest publishers lose income. The polluter spoils the web environment for everybody else. - by Markines, Benjamin; Cattuto, Ciro; Menczer, Filippo, "Social Spam Detection".

Not only is the content produced by these systems "low-effort", but these avenues are also used to spread misinformation. For example, conspiracy theories regarding COVID-19 were peddled by content farms, encouraging engagement by feeding into mass paranoia. The websites promoting these ideas often also shroud the identities of those making editing decisions, making it even more difficult to identify an agenda.

Content farms are also criticized for being the source of fake ad impressions, a form of ad fraud, that takes an unfair share of available advertisement spending away from legitimate publishers.

Reception of Content Farms

In one of Google's promotional videos for search published in the summer of 2010, the majority of the links available were reported to be produced at content farms. In late February 2011, Google announced it was adjusting search algorithms significantly to "provide better rankings for high-quality sites - sites with original content and information such as research, in-depth reports, thoughtful analysis, and so on". This was reported to be a reaction to content farms and an attempt to reduce their effectiveness in manipulating search result rankings.

Gabriel Weinberg, creator of privacy-focused search engine DuckDuckGo has reported that his search engine makes efforts to block content from content farms.

Research around Content Farms

Since their 2011 appearance on the web, content farms have not yet received much explicit attention from the research community. The model of hiring inexpensive freelancers to produce content of marginal or questionable quality was first discussed as an alternative strategy to generating fake content automatically; this was discussed together with an example of the infrastructure necessary to make content farm based sites profitable through online ads, along with techniques to detect social spam that promotes such content.

While not explicitly motivated by content farms, there has been recent interest in the automatic categorization of websites according to the quality of their content. A detailed study on the application of these methods to the identification of content farm pages is yet to be done.