Google Groups is a service from Google that provides discussion groups for people sharing common interests.The Groups service also provides a gateway to Usenet newsgroups via a shared user interface.While Madere was initially reluctant to remove archived material, protests from users and legal pressure led to the introduction of "nuking", a method for posters to permanently remove their own messages from search results.It already supported the use of an "X-No-Archive" message header, which if present would cause an article to be omitted from the archive.Users were then able to access these Usenet newsgroups through the new Google Groups interface.By the end of 2001, the archive had been supplemented with other archived messages dating back to May 11, 1981.
The Deja News Research Service was an archive of messages posted to Usenet discussion groups, started in March 1995 by Steve Madere in Austin, Texas.
For several years from May 2010 onward, Google incrementally changed the layout of the web search results pages, often degrading the discoverability of the site itself as well as its usability and functionality.
On February 13, 2015, a Vice Media story reported that the ability to do advanced searches across all groups had again become nonfunctional, and to date, Google has neither fixed nor acknowledged the problem.
Deja Communities were private Internet forums offered primarily to businesses.
In 1999 the site (now known as Deja.com) sharply changed direction and made its primary feature a shopping comparison service.