1. Logo or Personal Photo :: Before deciding whether to use your brand name or personal name, think about how you will be using Twitter. Some people use Twitter only as a broadcasting tool. "20% Sale in my Etsy shop!" "New post up on the blog!" Gross. That is just one big commercial.
Instead, I encourage you to use Twitter to develop business relationships with other users. While I have NEVER landed a new client directly through Twitter, I believe it has added value to my business in other ways. I have made meaningful business contacts (and even a few friends) through Twitter. You can meet new people through Twitter Chats or by scrolling through someone's feed. If someone you follow is having a conversation with someone else, there's a good chance you will want to follow that person, too.
2. Brand Name or Personal Name :: If you are using a logo as your profile picture, then list your brand name. Use your personal name if you include a personal photo. There is nothing more frustrating than staring at someone's face and not knowing what their name is. Nothing. Except maybe when you open your packet of gum and realize it is empty. Nooo.
3. Job Title :: Since you will be schmoozing it up on Twitter, list your job title. If you run the show at your biz, then let everyone know about it.
4. Tagline :: Use your brand's tagline to give a succinct description of what your brand has to offer. Unlike Instagram, this is not the place to write 'Rosemary Enthusiast'.
5. Instagram :: I know you are on Instagram, so include it. If you don't have room to write 'Instagram', then use the abbreviation 'IG'.
6. Location :: Don't forget to include your location. Twitter users are more likely to follow you if they see you are from the same place. Also, brands are more likely to follow you back if they see you are from the same area. Brooklyn is likely to follow Brooklyn because they want to support their local design community.
7. Link :: Link to your website.