The bank, which operates in stores, online and by telephone, has 6.5 million customer accounts, with services ranging from insurance to credit cards, loans and personal savings offers.

BBC: Tesco Bank faces fresh online access glitch

According to BT Global Services, 56 percent of online consumers agree that the calls they do make to customer service are much more complex, as simple transactions are often automated.

FORBES: The Future Of Customer Service: Lessons From Your Barber

Being successful in SEO these days involves thinking along the lines of great customer service, offering great products and services, being a thought leader, and building brand advocacy online.

FORBES: 3 Enterprise SEO Strategies for 2013