If you’re on social media, you know that when something happens in the world people are talking about it.

These could be global events that impact us all, or maybe something a little lighter like an unexpected ending on a TV show or an exciting moment in a sporting event.

This week, Facebook introduced a new feature to help you keep track of those conversations and find the information that’s important to you.

Learn more about Facebook’s newest feature and other hot topics you might have missed this week in our weekly news roundup:

1. Facebook rolls out “trending topics” on web

With the new feature, simply named “trending,” users will see a list of trending topics on the ride side of the newsfeed at the top of the page. The topics that are shown will be personalized based on your own network and will include a short description of why the topic is generating so much buzz.

When users click on the topics that are showing up, they will be shown a list of updates from friends posting about a topic.

Bottom Line: If you’re a Twitter user you may be wondering how Facebook’s “trending” differs from the “trends” that have been part of Twitter for awhile.

The biggest difference is Facebook’s personalization. While Twitter does give you the ability to filter topics based on location, it does not show you results based on your individual connections.

The other notable difference is that Facebook provides context for the trending topic, while Twitter only highlights individual terms. This will make it easier for users to identify the conversations that are taking place.

It’s clear that Facebook wants to be a source of real-time information, similar to how Twitter has functioned for quite some time. It will be interesting to see how Facebook users respond to the change.

2. Nearly 1 in 3 organic search visits occur on mobile

Mobile accounted for 32 percent of Google organic search visits during the fourth quarter of 2013, up from 30 percent of organic search visits in the previous quarter.

Overall, mobile accounted for 30 percent of organic search visits across all search engines, up from just 20 percent one year ago.

Bottom Line: With nearly one-third of organic search traffic now coming from mobile, businesses need to be thinking differently about how consumers are finding their business online.

Potential customers are making decisions based on their mobile behavior. If you don’t capitalize on this behavior, you may lose business to your competitors who have embraced this new reality.

Find out how you can use mobile search to your advantage.

3. Microsoft begins rollout of secure search option on Bing

Just a few months after Google rolled out secure search, which severely limited the amount of keyword data available to site owners, Microsoft has begun offering secure search as an option for users on Bing.

This has sparked some speculation that Microsoft will follow Google’s lead, further limiting access to keyword data on Bing and Yahoo, which also uses the Microsoft search engine on its site.

Bottom Line: Don’t panic. Limiting access to keyword data won’t have any impact on traffic to your site, it will only limit your ability to see which individual keywords are being used to generate traffic from search.

You should still continue to monitor your website and see which pages are generating the most traffic. You should also continue to focusing on creating engaging content that’s helpful and informative to your target audience.

By expanding on the content that’s already generating traffic and continuing to create content that answers the questions of your target audience, you’ll be in the best possible position to improve search traffic and find your next great customer.

4. Pinterest is the fastest growing network for social sharing

According to new data from ShareThis, Pinterest is now the third most popular channel for sharing content online, behind Twitter and Facebook.

Overall, the number of shares on Pinterest increased 58 percent in 2013, making it the fastest growing channel for social shares.

Shares across all social networks set new records in 2013, with consumers sharing 37 percent more often than in 2012. Clicks on shared content are also up, improving 12.6 percent year-over-year.

Bottom Line: Enabling social sharing on your website and blog is a great way to extend the reach of your content and help introduce your business to a whole new audience.

And while you may not have an active presence on a site like Pinterest already, by giving people the  opportunity to share your content on these sites you can start to reap the rewards these sites have to offer.

What hot topics caught your eye this week? Let us know in the comments below.