Why the half-life of a Pinterest pin is thousands of times longer than a tweet or Facebook post

"Sure, you get 70 percent of your clicks in the first two days," Pinquora CEO Shara Verma told me last week. "But there's a huge long tail. Clicks kept coming all the way for 30 days, and even beyond."

Twitter’s Vine is killing it, but #Music dropped 62% in May

Twitter's two major product launches 0f 2013 are heading in vastly different directions.

Google + Facebook = 70 percent of all mobile ad revenues worldwide

By itself, Google accounts for 56 percent of all global mobile ad revenues. Social giant Facebook takes a much smaller chunk with 13 percent. But together, they own the lion's share of mobile ad dollars.

Twitter’s new #FollowMe tool creates an instant Twitter highlight reel for you

Twitter and Vizify have teamed up to create a highlight reel of your best tweets, photos, and most engaging moments on Twitter, automagically.

You can now access your official Twitter engagement statistics (but don’t bother)

Sometimes there is a reason companies do things under the radar.

Buffer’s new Twitter optimization partnership with Moz boosts retweets and click-throughs 200%

If a tweet falls in the forest, does anybody hear it? With 555 million Twitter users and 58 million tweets on an average day, good luck.

Enter tweet optimization.

Twitter and $70B communications giant WPP announce ‘global strategic partnership’

You've probably never heard of WPP, but the communication giant's various brands drive $70 billion in media spend and took in $16.5 billion in revenue last year.

Lenovo: Geo-targeted Twitter Ads ‘can outperform search’

Search is the gold standard in the internet marketing world. Nothing beats customers finding you via organic search, arriving at your website straight from Google, ready and willing to make a purchase.

Perhaps almost nothing.

Twitter paints the world with your geo-tagged tweets

Twitter plotted all geo-tagged tweets for key global locations on a map. And the result is big data come to life -- and a vision of how we move, where we live, and where we congregate in the largest numbers.

Twitter users: Do you want a LinkedIn-style who-viewed-your-profile feature?

Twitter CEO Dick Costolo said yesterday that company engineers can roll out any experimental features they're testing to one percent of the social network's users.

Twitter to launch automated ad exchange to let brands retarget you via tweets

Twitter is planning to launch a Facebook Exchange-like service to allow brands to buy ads programmatically and retarget Twitter users based on their browsing and search history.

Twitter acquisition Crashlytics launches Android version to help developers build better apps

The company, which launched on iOS just over a year ago to "deobfuscate" application crashes, helps developers find what's happening when their mobile apps freeze or unexpectedly quit. Besides Twitter, companies like Square, Kayak, Yelp, Path, and Yammer use Crashlytics.

How to make a viral video

People share for two major reasons: “a) they altruistically want to share the enjoyment of that video with others or b) they selfishly want to be seen sharing or critiquing that video.”

Twitter updates mobile apps so you can tweet photos in under 6 seconds

Twitter updated its iOS and Android apps today to make tweeting pictures faster and better. And showed us the benefits via Vine, the social network's own video-sharing startup.

Twitter expanding #Music team in L.A., looking for a ‘head of music partnerships’

If you'd like to work for Twitter, live in L.A., and don't know a join from a conditional but have good connections in the U.S. music industry, you're in luck.

Bye-bye, Google Buzz (again)

Shockingly, most people didn't want a social network in their email inbox, so the experiment that consisted of Google taking your inbox and insta-poofing a social network into sudden awkward existence never had a prayer of upsetting Facebook, Twitter, or even MySpace.

Social commerce is like a unicorn: beautiful, alluring, and almost totally imaginary

Call it the unicorn problem: beautiful, alluring, magical, and totally non-existent. Social commerce, according to the latest Monetate e-commerce report, is almost as elusive.

Twitter granted pull-to-refresh patent that everyone already uses (and sort of gives it away)

The developer of pull-to-refresh was so concerned about how Twitter would use his patent that he asked Twitter to agree with him -- as part of the terms of the sale of his company -- that it would never use the patent offensively.