The 27 varieties of tweets used by retailers

You can use Twitter simply to promote products (best seen via the Twitter account operated by one-product a day business Woot), and to extend and improve the customer service channel. But what else is there? You’d be surprised at the sheer variety of tweets used by retailers. Some of these are covered under the broad umbrellas of 'sales' or 'service' but the detail shows the scope of what can be...