Previously a paid-for free zone, Twitter has now started testing phases on allowing companies to have “promoted by” tweets. One of the main features of these tweets is a company can set a budget and promote a specific tweet. The tweet will allow sub-text to be provided followed by ‘Promoted by ______’. This will also show the number of retweets that the ad has received. Currently, there are only a few companies that are allowed to use this tool and are testing to see how successful the program is. This new way of tweeting combines organic search with paid promotions. Read the full article from Blog Catalog.