Short answers, pulled from the story.
Final Fantasy VII: Advent Children is a 2005 CGI animated film set two years after the events of the 1997 game Final Fantasy VII. Cloud Strife and his companions fight three antagonists named Kadaj, Loz, and Yazoo, who plan to resurrect the villain Sephiroth using remains of the extraterrestrial entity Jenova. The film also depicts an incurable illness called Geostigma that afflicts many survivors of the previous game's events.
Tetsuya Nomura and Takeshi Nozue co-directed Final Fantasy VII: Advent Children. The script was written by Kazushige Nojima, and the film was produced by Yoshinori Kitase and Shinji Hashimoto. It was developed by Visual Works and Square Enix.
The film was released in Japan on the 14th of September 2005 on DVD and Universal Media Disc with Japanese voice acting. The English-dubbed version was released in North America and the United Kingdom on the 25th of April 2006, after the North American date was pushed back several times from its originally planned September 2005 release.
Final Fantasy VII: Advent Children Complete is a director's cut released on Blu-ray in Japan on the 16th of April 2009. It runs 26 minutes longer than the original 101-minute cut, contains roughly one thousand revised scenes, adds more detail to Cloud's arc and Denzel's background, and expands the climactic fight between Cloud and Sephiroth. It also introduced a new ending theme by Kyosuke Himuro and My Chemical Romance singer Gerard Way.
By May 2009, DVD and Universal Media Disc releases of Final Fantasy VII: Advent Children had sold over 4.1 million copies worldwide. In the United States alone, the DVD eventually grossed over US$58 million. On its first day of release in Japan, the Advent Children Complete Blu-ray sold over 100,000 copies.
Final Fantasy VII: Advent Children received the Honorary Maria Award at the Sitges Film Festival on the 15th of October 2005 and won Best Anime Feature at the 2007 American Anime Awards. Nielsen's 2006 tracking also ranked it the top-selling anime DVD in the United States for that year.