This node allows for mark-up language to be entered, specifically to add features into your flow which can be displayed in messenger.
There are many features you can include in your bot to make it more functional and easier to user for your end-users. Follow this link to see what features you can add into your bot.
Follow this link to see our full list of features: https://docs.servisbot.com/product-features/timeline-markup/
See “Switch” node further on in this document to understand how the bot can carry out different flows, based on what users select from these mark-up features