Sugg launched a range of beauty products under the brand name Zoella Beauty in September 2014. The "bath and beauty" range launch was, according to the Metro, the "biggest beauty launch of the year". The products were developed and manufactured by Gloucestershire-based family-owned company SLG Allstars Ltd. She launched an edition of the products called "Tutti Fruity" in 2015, as well as a limited Christmas edition. Sugg has been a director of ZS Beauty Ltd, a wholesaler of perfume and cosmetics, since 2016. In 2016, Sugg launched an edition called "Sweet Inspirations", followed by other ranges including "Jelly & Gelato", "Splash Botanics" and "Fruit Medley".
In September 2016, Sugg released a collection of home-ware products, including stationery, candles and reed diffusers. Sugg has been a director of ZS Lifestyle Ltd since 2016.
In June 2014, Sugg was a guest panellist on the daytime chat show Loose Women. She also appeared on This Morning in July 2014 to talk about social anxiety. In 2014, Sugg signed a two-book deal with Penguin Books. The North American publishing rights were purchased by Atria. Sugg's debut novel, Girl Online, was released on 25 November 2014. The book is aimed at a young adult audience and surrounds a 15-year-old anonymous blogger and what happens when her blog goes viral. While based around her similar experiences, Sugg has stated that the book is "in no way autobiographical". The novel achieved the highest first-week sales for a debut author since Nielsen BookScan began compiling such records in 1998, with 78,109 copies. As of December 2014, it was the fastest selling book of the year. Penguin stated that "Sugg did not write Girl Online on her own", stating that she had "worked with an expert editorial team to help her bring to life her characters and experiences in a heartwarming and compelling story". It was reported that young-adult novelist Siobhan Curham was a ghostwriter for the novel, although neither Penguin nor Sugg confirmed this; Penguin stated that Curham was an editorial consultant for the novel.
Sugg, along with The Slow Mo Guys and Vice News, featured in television, print, and billboard advertisements by YouTube in the UK which ran from 25 September 2014. The prime time TV adverts were broadcast on the three terrestrial UK channels. Sugg then featured on the 2014 single "Do They Know It's Christmas?" as part of the Band Aid 30 charity supergroup, raising money for the Ebola virus epidemic in West Africa. The single debuted at No.1 on the UK Official Singles Chart. Sugg also took part in the 2015 Comic Relief edition of The Great British Bake Off. A sequel to Girl Online, titled Girl Online: On Tour, was released on 20 October 2015. A third book, Girl Online: Going Solo, was published on 17 November 2016. Sugg's books, alongside those by other YouTubers, were criticised in 2017 for 'not being challenging enough' in a number of UK newspapers.
In late 2016, Sugg and brother Joe released a range of branded merchandise called 'Sugg Life', created in collaboration with The Creator Store, a company owned by Alfie Deyes and Dominic Smales of Gleam Futures. The term 'Sugg Life' is a play on 'Thug life', a phrase popularised by Tupac Shakur's 1990s hip hop group of the same name and more recently an internet meme. The online shop offered a range of products such as hoodies, stickers and phone cases. In August 2017, The Creator Store opened a pop-up shop in Covent Garden which, for ten days, sold limited edition 'Sugg Life X PB' merchandise; a collaboration of Sugg Life and Deyes' 'Pointless Blog' brands. As of May 2018, the Sugg Life online shop is no longer active. Sugg and Deyes are directors of A to Z Creatives and A to Z Merchandise, a Brighton-based brand agency, which they founded in 2018. They are also directors of Crew Live Limited (the company responsible for YouTube convention Hello World) alongside fellow YouTubers Tanya Burr, Marcus Butler, Jim Chapman, Caspar Lee, Louise Pentland, Niomi Smart, Joe Sugg, and Gleam Futures CEO Dominic Smales.
Sugg's non-fiction book, Cordially Invited, offering advice on entertaining guests at home and planning celebrations, was published by Hodder & Stoughton in October 2018.
