Twitter buys Bluefin Labs, a social-television analytics firm.

Twitter bought Bluefin Labs, a social-television analytics firm. The deal or the largest acquisition in the history of Twitter.

The source did not disclose the exact amount of the acquisition, but said the deal was the largest ever by Twitter.

Before acquiring Bluefin Labs, Twitter bought TweetDeck at a price of $40 million in May 2011.

The media speculated that the purchase price of Twitter could be between 50 million and 100 million dollars, perhaps even higher, given that Bluefin labs has so far financed $20.5 million trillion. This to Time Warner investment, soft silver capital, Red Point venture capital and other Bluefin labs investment party, the income is more reasonable.

Twitter's move into social-television is justified, watching TV and posting on Twitter, where there is a strong link between the two activities. Twitter hired a television industry executive last fall.

In addition, Twitter has been hailed by professional media as the new TV Guide. The company also finalized a multi-year cooperation agreement with Nielsen last December to produce the first social-television rating system. The system will use some conventional metrics and will reflect the number of times a program has been mentioned on Twitter. The system will be officially commercially available in the autumn of 2013.

Bluefin labs can point out which brands are more mentioned in social media and can give a detailed report on this. Twitter can send a report to advertisers through the company telling them how to allocate marketing expenses.

Neither Twitter nor Bluefin Labs responded to the media's request for an interview.