Claus Ebster's keynote address at the Store Conference 2018 emphasizes the importance of omnichannel retailing, highlighting the need for retailers to embrace digital technology and focus on customer experience. He discusses strategies for brick-and-mortar stores to compete against online giants, including community engagement, differentiated store design, and integrating online and offline experiences through techniques like click and collect. The address also underscores that while technology can enhance shopping, it should not overshadow consumer insight and needs.