Twitter Expands Promoted Tweet Advertising Beyond Its Site

Twitter Inc. is expanding its advertising base in a way that may affect how Wall Street sees the Web company’s revenue prospects.

Twitter, which will report earnings Thursday, has started displaying tweet-based advertising, known as Promoted Tweets, beyond its main website, the company said Tuesday in a blog post. The announcement buoyed the company’s shares, sending them up 6.2 percent to $39.79 at the close in New York.