WPP, a British multinational advertising and public relations company, agreed to acquire Diff, a commerce agency based in Montreal. Diff will join the Wunderman Thompson global network. Financial terms were not disclosed. "The tremendous growth in the digital commerce ecosystem means our clients are looking to us to deliver the innovative solutions they need to reach new and existing customers in meaningfully engaging ways. Diff's Shopify expertise, alongside its unique blend of strategy, optimization and design, will be a welcome addition to our commerce portfolio and will drive results for our clients in North America, which is WPP's largest market," Mark Read, WPP CEO.