The Advertising Standards Authority (ASA) is the independent regulator of advertising across all media in the UK. It ensures advertisements are truthful, legal, and do not harm consumers. The ASA reviews every ad and applies advertising codes to protect the public, especially children, from offensive, misleading or harmful content. Advertisers can seek advice from the ASA to help their ads comply with regulations. If advertisers continue to violate the codes, the ASA can require ads to be removed or refer cases to organizations like Ofcom for further action.