You can flag tweets as stemming from a bot (or a fake account) or identify those that include malicious links. There are also options to report tweets with unrelated hashtags (which scammers can use to pop up on trends, for instance) or indicate if a user is spamming replies to someone.
The expanded reporting tools arrive just after Twitter launched its midterm election hub -- which featured fake news, tweets from conspiracy theorists and what appeared to be bot accounts. With the election just days away, it's possible that more inflammatory bots will appear in your feed, so you could find yourself taking advantage of these reporting methods.
Bots pose a broader problem beyond elections, however. The company said in July that it removed 70 million fake accounts in the previous two months. Perhaps the new functions will streamline the reporting process and allow Twitter to get rid of bad actors faster.