To counter the online threat, bricks and mortar retailers are playing catch-up, using increasingly sophisticated technology to improve staffing, layout and marketing.
Some people are less comfortable being watched in the offline world, prompting many in the business to promise to use only anonymised and aggregated data unless shoppers explicitly give their permission to be tracked.
But as retailers get more sophisticated and link the data they collect to loyalty card schemes, shoppers are starting to sign up to schemes that follow their movements in return for targeted discounts and apps that help them find products.
German fashion house Hugo Boss is using heat sensors to help place premium products. Luxury chocolate store Godiva has installed meters to count shoppers so it can match staffing to peak hours and measure the draw of window displays.
"Our customers are trying to run their stores or malls more efficiently," said Bill McCarthy, Europe and West Asia head of ShopperTrak, the US firm behind the Godiva counters.
"They are just trying to get real smart with data in the way the e-commerce guys are smart with data," he said. The Chicago-based company says its counters, while not a new idea, helped Godiva's store in London's Regent Street improve customer service and hone its window displays, boosting transactions by 10 per cent in six weeks.
Consumer consent?
As retailers seek ever more information, ShopperTrak has been investing in high-tech video and phone tracking systems to analyse how customers and staff behave inside a store.
"The information that we collect is strictly anonymous. We make extra efforts to ensure we keep nothing that is potentially personally identifiable," McCarthy said.
Tesco, the world's third biggest retailer, drew criticism from British privacy groups earlier this month with plans to scan the faces of queuing customers to determine their gender and rough age to better target adverts.
The company, which put the tracking of customer behaviour on a whole new level with its Clubcard loyalty card two decades ago, said it would not record images or store personal data.
Its advisers say some other retailers are less responsible.
"Too much is happening without consumer consent," said Simon Hay, chief executive of Dunnhumby, the customer science company owned by Tesco that is behind its loyalty scheme.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
)