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Advertisements in a paper are generally brief, as they are charged for by the line or word, and are one newspaper column broad.
Publications printing news or other details often have areas of categorized advertisements; there are likewise publications that include just ads. The ads are organized into classifications or classes such as "for sale-- telephones", "desired-- cooking area appliances", and "services-- plumbing", thus the term "categorized". Categorized advertisements typically fall into 2 types: people marketing sales of their individual items, and advertisements by local companies. Some services utilize classified ads to employ brand-new staff members.
One concern with paper categorized marketing is that it does not permit images, despite the fact that display advertisements, which do permit images, can be discovered in the classified area.
Over the last few years the term "categorized marketing" or "categorized ads" has expanded from merely the sense of print ads in regulars to consist of similar types of advertising on computer services, radio, and even tv, especially cable television service but occasionally broadcast television too, with the latter taking place normally really early in the morning hours.
Like many forms of printed media, the classified advertisement has actually discovered its way to the Internet, as papers have actually taken their classified ads online and brand-new groups have discovered the advantages of classified advertising.
Web classified ads do not normally utilize per-line pricing designs, so they tend to be longer. They are likewise searchable, unlike printed material, tend to be regional,  and may cultivate a greater sense of urgency as an outcome of their daily structure and broader scope for audiences. Due to the fact that of their self-regulatory nature and low cost structures, some business provide free classifieds worldwide. Other companies focus generally on their regional hometown region, while others blanket urban locations by utilizing postal codes. Craigslist.org was among the first online categorized sites, and has actually grown to become the biggest classified source, bringing in over 14 million special visitors a month according to Comscore Media Metrix.  A growing variety of sites and business have started to provide specific classified marketplaces online, dealing with niche market product or services, such consist of boats, pianos, animals, and adult services, among others. In a lot of cases, these specialized services offer much better and more targeted search capabilities than basic online search engine or general classified services can offer.
A variety of online services called aggregators crawl and aggregate classifieds from sources such as blogs and RSS feeds, rather than relying on manually sent listings.
In addition, other companies offer online marketing services and tools to assist members in designing online advertisements utilizing expert ad templates and after that instantly distributing the finished ads to the numerous online advertisement directories as part of their service. In this sense these companies serve as both an application company and a material delivery platform. Social classifieds is a growing niche.
In 2003 the market for classified ads in the United States was $15.9 billion (papers), $14.1 billion (online) according to market scientist Classified Intelligence. The around the world market for categorized advertisements in 2003 was estimated at over $100 billion. Perhaps due to the lack of a standard for reporting, market stats vary concerning the total market for internet classified ads. The Kelsey Research Group listed online classified ads as being worth $13.3 billion,  while Jupiter Research offered a conservative appraisal of $2.6 billion as of 2005  and the Interactive Advertising Bureau listed the net worth of online classified income at $2.1 billion as of April 2006.
Newspaper's revenue from classifieds advertisements is decreasing continually as web classifieds grow. Categorized marketing at a few of the larger newspaper chains visited 14% to 20% in 2007, while traffic to classified sites grew by 23%.
As the online categorized marketing sector establishes, there is an increasing emphasis toward specialization. Vertical markets for classifieds are establishing rapidly in addition to the basic marketplace for classifieds websites. Like online search classified ads engine, categorized sites are frequently specialized, with sites providing marketing platforms for specific niche markets of buyers or sellers.