American Express shook up the deal space on social media this week by rolling out its new Twitter features. Along with Amazon, Finish Line and Target, many of the biggest names in retail showed up in Retail Dive's most popular news posts.

If you feel like you need to get caught up on what's been going on in the industry this week, now is your chance. Have a look at what your fellow readers cared about below:

• ForeSee: In-store, mobile integration equals success: ForeSee's latest Mobile Satisfaction Index revealed the need for retailers to integrate their in-store experience with their e-commerce platform.
• Finish Line lost $3M in three weeks for e-commerce fiasco: Still reeling from its switch to a new e-commerce platform in November, Finish Line's CDO has resigned.
• American Express, Twitter unveil tweet-to-purchase plan: American Express and Twitter plan to create a shopping experience unlike any other.
• Target hopes to score big with Prabal Gurung: Gurung joins the list of designers to make jaw-dropping debuts for Target.
• Report: Amazon e-traffic soars; Walmart, others in decline: Amazon continues to build on its lead in e-commerce as Walmart reports struggling online sales numbers.

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