Above-the-line media has been audited for many years to ensure the buying plan is effective. This has been primarily the preserve of larger spending advertisers. The Digital Auditors deliver optimisation to all. The Digital Auditors combine deep digital channel knowledge, statistical skills and real-life commercial success. We use a wide range of techniques to support our audits which lead to actionable recommendations. We find that the digital marketing nuances of each industry have wide reaching applications.