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A “Buy now” button has appeared on certain tweets, starting this past Monday. In one example, if a person clicked on the buy now button, Twitter would direct them to so they can buy the product they viewed.

However, this button so far only appears on the mobile version of Twitter and not on the online web version. The button appears in the timeline view and expanded view. Tech news site Recode was the first one to discover the new button.

A Wall Street Journal reporter said Twitter is currently testing a “click-to-call” button, which would put customers directly in contact with the business or company that was posted.

The new buy now button would add new revenue to Twitter, according to

Currently, no timeline has been officially set for an official debut.