What are the chat launch and landing pages?
Oracle Service Chat
Customer Portal, Chat - Enduser Pages
The chat_launch page is used to collect the customers information before launching the actual chat. After the user chooses to start a chat, they will be re-directed to the chat_landing page.
Below are related published answers:
Phone Number Field on the Chat Launch Page
Passing custom fields from a chat launch URL to a resulting chat and incident
Visibility settings with incident custom fields specific to chat
Adding and customizing fields on chat_launch page
See also: Answer ID 4725: Popular Answers About Chat.
For additional information, refer to the 'Chatting on the Customer Portal' section in online documentation for the version your site is currently running. To access Oracle Service Cloud manuals and documentation online, refer to the Documentation for Oracle Service Cloud Products.