There were some interesting developments and milestones reached in social media this week.

Facebook is expected to announce plans to change its large, single column news feed. This would be the first major change to the news feed design in seven years. Rumor has it Facebook will expand to multiple feeds and feature some sort of Instagram and Spotify integration. The new design could feature a feed for photo, music, and another feed featuring only news, videos and app sharing.

We’ll know more about this development tomorrow after Facebook’s big planned press event. Stay tuned for more information. One billion is the magic number this week.

LinkedIn reached one billion Endorsements this week.

The feature was launched in September 2012. Users can vouch for other user’s specific skills with only the click of a button. It was created to encourage more profile interaction and it’s accomplished that. However, it remains to be determined if these quick Endorsements have any positive impact on your digital professional presence. Personally, I’m not convinced a classmate vouching for your public speaking skills, without a formal recommendation, will result in your speedy employment.

Sesame Street became the first nonprofit and US children’s company YouTube channel to reach one billion views.

Sesame Street’s latest video starring Count von Count, posted today, is titled “Counting the ‘You’s in YouTube.” One of the channel’s most popular videos, “Elmo’s Song,” has over 87 million views. YouTube is frequently banned in school environments, but this milestone makes a significant statement about YouTube’s educational possibilities.

Twitter announced it will discontinue its mobile apps, discontinue Facebook integration in May and focus more on its web-based version.

The Twitter-owned TweetDeck will be removed from app stores by early May and will stop functioning shortly after that. TweetDeck’s team say the decision reflects where the majority of their users are using their product. Recently, Twitter’s mobile app added major features including photo filters, revamped user profiles and an advanced search. TweetDeck’s features fill some users needs and if the mobile app isn’t cutting it, why not redesign for better functionality? Instead, Twitter’s content to forfeit those users who will either go to their Twitter app or one of their competitors. Tumblr mobile users will see ads soon.

Companies will be able to promote their posts to mobile app users within the next three months. The ads will mirror ones added to the website format months ago. Users and advertisers can promote content for as little as $1 a post.

Tumblr’s mobile users have quadrupled in the past six months and are closely approaching the amount of users on its website. Tumblr has a monthly audience of more than 170 million. With this new development, Tumblr hopes to turn its first annual profit in 2013.

Google+ launched a redesign of profiles and pages today in attempt to steal some of Facebook’s thunder. New feature include a “Local Reviews” tab, larger cover photos with a better aspect ratio and an easier way to edit information in the “About” tab. We’re expecting more features to be unveiled in coming weeks.

Stay tuned on this development. To summarize this week’s developments, social media continues its massive growth and platforms strive to stay relevant and exciting as they grow. What do you think about these developments? Do you think these redesigns are exciting or unneccessary?