It is uncertain at this time as to how many users are seeing the new Ads button since Twitter has not officially announced the addition. However, both the iOS and Android app were recently updated on their respective app stores.

Previously, the users could see the feature included in the list which appeared when they tapped the Settings option. At that time, Twitter Ads was visible right above the options for Lists, Drafts, and Help.

Twitter is also testing a new way to use the messaging platform for shopping by promoting "products and places" in its feeds, as it looks to boost revenues.

"We're starting to experiment with a small number of products and places," Twitter product manager Amaryllis Fox said in an official blog post. "As we test, within your timeline you may see pages and collections of pages that are shared by influencers and brands," Fox said.

The move will expand the platform beyond tweets to pages with product information and in some cases "buy" buttons.