Twitter just announced the expansion of its Promoted products (also known as ads) across its mobile experience.

While Promoted Trends and Tweets have been on Twitter’s mobile search for a while (and likewise for Promoted accounts and Promoted Tweets in the timeline), Promoted accounts are now coming to Twitter’s iPhone and Android apps.

“And in the coming weeks, we’ll begin introducing Promoted Tweets in the timeline on these mobile apps,” the company says in a blog post. “Initially, a small number of users may see Promoted Tweets near the top of their timelines from brands they already follow. This will help ensure that people see important Tweets from the brands they care about.”

Twitter points out that the experience will be the same on mobile as it is on Twitter.com, with promoted tweets appearing in the timeline like any other tweet (once) and the promoted tweet flowing with the rest of the tweets in the timeline. Additionally, like with Twitter.com, the mobile Promoted Tweets in search will be displayed in the timeline when relevant. Promoted Accounts will appear in the “who to follow” list.

Twitter says the news represents an important part of its advertising efforts. No doubt about that. You might say Twitter is even ahead of the game compared to Facebook, in terms of mobile ads.