It’s been quite the week. Among the highlights: a hashtag analysis of the top 100 emojis on Instagram, the launch of Pinterest’s ‘Buy It’ button, and Instagram’s big announcement about ads. Here we go!

1. And the most popular emoji on Instagram is …

Over a one-month period, Curalate found that individual emojis on Instagram have been hashtagged more than 6.4MM times. To explore the growing importance of emojis in Instagram communication, we put together a fun infographic ranking the top 100. See if your favorites made the cut.

2. Pinterest announces ‘Buy It’ button.

This week, Pinterest announced the launch of its ‘Buy It’ button, enabling consumers to buy products directly from pins. They’re called “Buyable Pins” and are available to businesses of all sizes.

3. Neiman Marcus, Nordstrom launch Pinterest commerce to capture impulse sales.

Neiman Marcus and Nordstrom are looking to increase mobile sales as launch partners for Pinterest’s Buyable Pins feature. “Pinterest is the perfect visual playground, it’s a place where the Neiman Marcus shopper can create her own personal look book, where she can mix and match designers and make purchasing decisions that she can now act on quickly,” says Natalie Bowman, Vice President of Media at Neiman Marcus Group Services, Dallas.

4. Forget Protein World, Instagram is driving the new fitness ‘regime reality.’

Instagram has become the unintentional author of “regime reality,” a universe predicated on a feel-good aesthetic and need to show off and share your goals with everyone else. According to James Kirkham, Global Head of Social and Mobile at Leo Burnett, and co-founder of Holler, this has created an entirely new business category, where the platform is Instagram, the currency is audience follows and the income opportunity is vast.

5. Tumblr replaces ‘Ignore’ with a more robust ‘Block’ feature.

“Tumblr has made it easier to keep trolls out of your account. The feature has been renamed ‘Block’—‘A proper, muscular name,’ the Yahoo-owned company said—and it’s accessible from several locations on the website. To shake off haters and weirdos, you can click on their avatar on your dashboard to load a right-hand side menu, where you can find block under the human-shaped icon.”

6. Pinterest has a strong chance of building a big commerce business.

“[Pinterest’s move to add a buy button] makes perfect sense. Unlike Facebook or Twitter, which focus respectively on sharing moments from the past and present, Pinterest has always been about the future. People use the social network to plan their weddings, decorate their homes, and figure out where to travel – giving Pinterest valuable insights into what its 70 million monthly users want.”

7. Take the wheel: 5 ways to drive buyer behavior with UGC.

Your website is the No. 1 place consumers go when they want to keep in touch with your brand. Whether you want them to explore, laugh or buy, MarketingLand lists five ways that user-generated content can make it happen.

8. Tumblr debuts its own GIF search engine.

“Tumblr [announced this week] a new feature designed to take advantage of the extensive collection of GIFs hosted on its service: a GIF search engine. The news follows that of Facebook’s decision to officially support the animated file format on users’ Timelines, announced last week. With Tumblr’s implementation, web users will now be able to more easily locate GIFs on Tumblr as well as add them to their posts, while also properly crediting the GIF’s original creator, the company says.”

9. Sigma Beauty’s customer-focused strategy: “UGC is the secret to our success.”

For a business fueled by ecommerce, exhibiting how a product will present itself in the real world can be a challenge. In this Q&A with Sigma Beauty’s Social Media Strategist, Amber Mulle, you’ll learn how Sigma has been able to monetize their customers’ content on social and their site. Amber sheds light on Sigma Beauty’s UGC strategy, providing valuable insight into how marketers can harness fan images to generate revenue.