PurposeThe purpose of this paper is to provide an overview of the application of Rich Site Summary (RSS) in academic and public libraries emphasizing characteristic features and purposes of use. It seeks to highlight the degree of adoption of RSS in different regions and also between different types of libraries.Design/methodology/approachConvenience sampling method was followed to select four samples of population, one from each of four continents. Data were collected, using the content analysis method, along the checkpoints developed after consulting various literature and web sites. Data analysis was performed using Microsoft Excel.FindingsThe findings highlighted the basic features of RSS applied in libraries and the specific purposes of its use around the globe, underlining the areas where RSS is most effectively implemented. Disparities were revealed in RSS adoption between academic and public libraries, which may be attributed to diverse user profiles across different social spheres. Though there is little difference between libraries in North America and Australia with regard to the extension of RSS implementation, its adoption is considerably higher in North American libraries. However, the disproportionate use of RSS may be attributed to the differential internet penetration rate across the continents.Research limitations/implicationsThe current study was restricted to four continents – North America, Europe, Asia and Australia, and the survey was completely internet based, conducted on library web sites accessible to all and available in English. Content analysis, combined with questionnaire and interview method may enable future researchers to focus on other aspects, such as the impact of RSS on users' and librarians' attitudes and perceptions. This, in turn, may help measure how far library web sites using RSS are capable of motivating and engaging users in harnessing web‐based library facilities and services.Originality/valueBeing an exhaustive assessment of one of the most viable library initiated net‐based functionalities; the findings provide concrete evidence of the applications of RSS in libraries across the continents. The findings will guide future librarians toward using library web sites effectively to provide web‐based information services, enhancing sustainability and service values.