Job search engines operate very much like other consumer oriented Internet search engines like Google and Yahoo. These sites comb the web for content that is then qualified as containing a job posting. The site then regularly aggregates that job content and makes it readily available for job seekers through a simple, intuitive, and familiar search interface.
The emergence of vertical or Meta search engines allows the job seeker to see the multitude of sites from which the site is gathering data and note patterns for themselves, which also aids in the refinement of particular searches. Most of the search sites contain tools for calculating trends, such as in salary or number of job listings.
The most popular search engine for jobs, Indeed.com, has recently added functionality to include features normally found in "traditional" Internet job boards. Indeed now offers the ability to post your resume online. Recruiters can search these resumes in much the same way as in a traditional resume data-bank. The search engine became the most visited website in the employment space, topping even the largest job boards such as Monster and Careerbuilder, in terms of Internet visitors.
When referring to job search engines, people may also be referring to job data search, such as that of the BLS. The main fact-finding body for labor research in the United States is known as the Bureau of Labor Statistics (BLS). As a governmental agency the BLS gathers, collates, analyzes, and publishes essential data on labor. The agency also serves as an important statistical resource for the US Department of Labor. The data released by the BLS must satisfy a number of different criteria: timeliness concerning changing economic conditions, relevance not only to economic but also social issues, accuracy and quality of sampling pools, and most importantly, impartiality.