Welcome messages let businesses greet people and set expectations as they enter a Direct Message conversation—without requiring people to send the first message. Businesses can create multiple welcome messages and deep link directly to a specific greeting from Tweets, websites, or apps. Welcome messages help businesses demonstrate their commitment to service and help people learn what options exist to engage with a business in Direct Messages.
Quick replies let businesses prompt people with the best ways to reply to a Direct Message, whether by choosing from a list of options or guiding users to enter specific text values. Twitter Adds Welcome Messages and Quick Replies in DMs [blog.twitter.com]
