Dr. Mark Grether

Dr. Mark Grether

Mark Grether, Senior Vice President and General Manager, PayPal Ads
Mark Grether is senior vice president and general manager of PayPal Ads. In this role, Mark is responsible for building an advertising business that will help make merchants smarter so they can sell more products and services effectively, as well as enable consumers to discover more of what they love.

Prior to PayPal, he was the vice president, general manager of Uber Advertising. Under his leadership, Uber Advertising grew to a $1 billion business with more than 500,000 advertisers globally. He successfully led the acceleration of the company’s global advertising business, helping merchants, brands, and other advertisers reach Uber’s highly engaged user base across its mobility and Delivery divisions.

Prior to Uber, Grether led the product strategy for Amazon’s advertising business, and he served as CEO of Sizmek, one of the largest independent advertising platforms globally, which was sold to Amazon in 2019. Prior to Sizmek, Mark was the co-founder and global COO of WPP’s Xaxis, which became a leading programmatic media company.
Artificial Intelligence (AI), Marketing
AI Shopping Creates an Opportunity for Retailers to Reimagine the New Storefront
April 29, 2026 at 7:52 am

Something strange is happening in e-commerce. Consumer spending is up. Online time is up. Yet traffic to major retail websites is declining. The answer is actually quite simple: shoppers are changing how they research and where they buy. Their starting point, which used to be about discovery, is now where they're making decisions. Many may…

Marketing
How Advertising is Evolving in the Era of the Empowered Shopper
October 15, 2025 at 1:58 pm

Shoppers today are more autonomous, informed and decisive than ever. They’re discovering, comparing and transacting in real time, often outside the boundaries of traditional storefronts. This shift demands a new kind of advertising, one that moves at the speed of consumer intent, appears in the right context, and collapses the distance between discovery and purchase.…