Twitter Ad retargeting has been proven to be an increasingly viable option as a social media advertising platform. With 317 million monthly active users, interest and location targeting on Twitter have seen a lot of improvements. If you have a good organic audience engaged on your Twitter page, Ad retargeting can be an excellent way to gather new qualified leads. In order to use Twitter for a successful Ad retargeting campaign, there are some rules that you can follow or read up on. Here: http://www.antoniocalero.com/2
With that being said, if you have a better audience residing at your Facebook or Instagram page, then investing on Instagram or Facebook campaigns would make more sense. AdRoll is worth checking out for Instagram or Facebook Ad Retargeting. For Twitter Ad Retargeting, you should definitely check out Perfect Audience.