Wikipedia platform has a whole long list of guidelines given by the Wikipedia community. It is must for a writer to follow those guidelines. The use of promotional tone for anything in the Wikipedia articles is strictly prohibited. Wiki page creators have to be very careful while writing the article especially when they create a Wikipedia page. The platform asks only for relevant useful information that is free of any biasness, promotions and untrue statements. Moreover, it is also suggested to avoid the application of any kind of marketing techniques in the article. Have you seen any promotional content on Wikipedia?