While Twitter is undergoing a number of significant changes, it is also working on a number of smaller updates and tweaks that may or may not ever be published but may add useful functionality for a large number of users.
In order to allow users to identify the precise individuals who have liked their tweets, Twitter is testing the ability to search through Likes. Twitter claims that it may be especially useful for marketers as a research tool to help them understand their audience and who they are reaching with their tweets.
Twitter is also experimenting with a new method of reply filtering, which may come in handy if a tweet receives a lot of responses. Additionally, Twitter is testing new timeline settings that would give users more control over their timeline and pinned lists.
