"Thank U, Next" was critically acclaimed, with critics praising the song's catchiness and positive message. The song debuted at number one on the Billboard Hot 100 in the United States, becoming Grande's first number one single. Internationally, it topped the charts in the United Kingdom, Australia, Canada, Estonia, Finland, Greece, Ireland, Lebanon, Malaysia, New Zealand, Portugal and Singapore, the top ten in Austria, Belgium, the Czech Republic, Denmark, Hungary, Iceland, the Netherlands, Norway, Slovakia, Sweden and Switzerland, and the top twenty in France and Germany.
On November 2, 2018, the singer tweeted lyrics of a mysterious track, after her ex-fiancé Pete Davidson joked about their broken engagement on Saturday Night Live. The following day, Grande tweeted more lyrics, revealing that they indeed belong to a track named "Thank U, Next", which she described was lyrically and conceptually the opposite of her Dangerous Woman track "Knew Better". The singer also revealed "Thank U, Next" would serve as her fifth album's name, which she had been teasing for months on Twitter.
The song was released on November 3, 2018, without any prior official announcement or promotion.