1. Press and hold down the Home button to activate Siri on your iPhone or iPad running iOS 7.
2. You can check what a specific person is tweeting by just saying the name out and you will be able to see all their tweets.
3. Suppose you want to find out tweets about #technology, you can just say hashtag; followed by the specific word and Siri will pull in recent tweets containing the search term or specific hashtag.
4. To even see what is trending with twitter, just by simply saying, What are the top trending topics on Twitter?”, Siri will pull in recent trending topics or tweets that are trending and to view the details, it will take you to the Twitter app.