
'Shout Out to My Ex' was released on 16 October 2016, as the album's lead single. To promote the album, the band performed at the Jingle Bell Ball and on The X Factor, and on their fourth concert tour, The Glory Days Tour, which ran from May to November 2017. It is a dance-pop, tropical house and R&B album. The re-issued album includes the single 'Reggaetón Lento (Remix)', a remix of CNCO's song featuring the band, which peaked at number five on the UK Singles Chart, along with three other previously released remixed singles, three new songs and a bonus documentary 'Glory Days: The Documentary'. The group re-issued the album on 24 November 2017 as Glory Days: The Platinum Edition. In January 2018 the album was certified triple platinum in the UK for shipments of 900,000 units. The album debuted at number one on the UK Albums Chart and stayed there for four weeks it later became their first album to yield more than two top ten singles when the fourth single, 'Power', reached number six on the UK Singles Chart. The single later won the Best British Single award at the 2017 BRIT Awards. The album was preceded by the UK number-one single 'Shout Out to My Ex', released a month before.

It was released on 18 November 2016, by Syco Music and Columbia Records. Glory Days is the fourth studio album by British girl group Little Mix.
