For many retailers, point of sale systems that integrate ecommerce software are a must. Although brick-and-mortar purchases still dwarf the amount of money spent online, more consumers are turning to the Internet to find the deals and items they are most interested in. During the busy holiday shopping season, some customers will also browse the Web to avoid the crowds in physical stores. 

In Denmark's case, the ecommerce analytics firm Dansk E-handelsanalyse anticipates that new holiday sales records will be set this year. Emarketer noted that digital shoppers are predicted to buy DKK1.2 billion ($207 million) in goods this year, a 33 percent uptick from 2012. About 81 percent of the country's Internet users age 14 and older have bought products on the Internet throughout 2013, and this number is expected to reach 84 percent by 2017. 

Most of the retail spending in the country remains focused on brick-and-mortar locations, but ecommerce sales are predicted to reach 15 percent, up from the 12 percent spent online last year. Due to the growth in Internet-based purchases, merchants should ensure their websites and POS systems are robust enough to handle an increasing level of traffic.