Social search engines
are considered a part of Web 2.0 because they use the collective filtering of online communities to elevate particularly interesting or relevant content using tagging.
Topsy is one of a group of social search engines that appeared about 3 years ago.
The freshman class of social search engines has had a high dropout rate, succumbing to underfunding and flawed business models.
To answer this type of question online, a social search engine
needs "very different architecture, algorithms, and user interfaces than a search engine based on the library paradigm," according to Horowitz and Kamvar.
Topics discussed include comparisons of social search engines
, localized web search, evaluating web search retrieval effectiveness, diversity aware search, search engine interfaces and credibility assessments, and test in "truth" claims in search results.
Additionally, social search engines
that use peer-to-peer feedback should be considered for investment.
Online tools such as search.twitter.com, board reader or a variety of free social search engines
and discovery tools like socialmention.com, buzzsumo or topsy can be used along with Google Alerts to surface interaction opportunities.
In the chapter on ' The Many Ways of Searching the Web Together: A Comparison of Social Search Engines
', the authors Manuel Burghardt, Markus Heckner and Christian Wolff have described the social web in the modern context with the discussion on social web characteristics.