Short answers, pulled from the story.
Attack on Titan premiered on the 7th of April 2013, on Mainichi Broadcasting System in Japan. It concluded on the 5th of November 2023, with the broadcast of the final television special, after a decade-long run across four seasons.
Wit Studio animated the first three seasons, with Tetsuro Araki directing. MAPPA took over for the fourth and final season, with Yuichiro Hayashi and Jun Shishido as directors.
Hiroyuki Sawano composed the soundtrack for all four seasons. Kohta Yamamoto joined him as co-composer for the final season, and their collaboration won Best Score at the 7th and 8th Crunchyroll Anime Awards.
Attack on Titan broke the Guinness World Record for the most in-demand anime TV show and held the title of world's most in-demand animated TV show until Jujutsu Kaisen surpassed it in 2024. In 2021, it was the most viewed television program in the United States for a period, making it the first non-English language series ever to hold the title of world's most in-demand TV show.
Yes. China banned it in 2015, along with 38 other anime and manga titles, citing scenes of violence and crimes against public morality. Russia banned it in July 2021 citing concern for youth welfare, and legal streaming became unavailable in Russia following international sanctions in 2022.
Isayama worked closely with animators during Season 3 and personally requested changes to parts of the story he regretted handling a certain way in the manga. Wit Studio honored his request, resulting in the first part of Season 3 differing from its corresponding manga chapters.