An HTML5 banner delivery checklist for ad.size, clickTag, weight, backups and ZIP packaging, checked against Google, Trade Desk, Amazon and Yahoo specs.
Creative production for display ads, explained for agency PMs: the roles, a six-stage workflow, the specs that shape it, and when a studio beats in-house.
Mobile banner ad sizes for 2026: 320×50, 320×100, 300×250 and 320×480, with platform support, weight limits and 2x retina rules. Get the full spec table.