OOH media globally has had its best year to date, and OOH spend is forecast to grow to $49.8bn USD in 2025 according to the World Out of Home Organization's latest Global Expenditure Report.

The Out of Home (OOH) industry has today announced a net media revenue increase of 16.13% for Q1 2025, reporting $334.1 million, up from $287.7 million* for the same period in 2024.

Ad specs are essential for advertisers and designers to follow, as they ensure that ads meet the technical requirements of the platform where they will be displayed. Adherence to ad specs helps avoid issues such as poor rendering, slow loading times, or non-compliance with platform standards.

Spreadsheets once worked for managing specs, but today’s fragmented media landscape makes them slow, error-prone, and costly. This article explores the hidden risks of legacy tools and how modern platforms like The Spec Sheet are transforming advertising production.