This article outlines the database structure for the MMv4 sys_message_us_english database table. This table contains the data for system-generated messages shown in the storefront. 

• id
  Primary Key of admins table.
  int(10) | unsigned | auto increment | primary key | indexed
  
• name
  The name of the message.
  varchar(255) | indexed
  
• type
  The type of message, either error or message.
  varchar(255) | Values: error/message | indexed
• category
  The user-defined category of the message, e.g. basket, customer, payment gateway, etc.
  carchar(255) | indexed
  
• description
  The description of the message, displayed only to admins.
  varchar(255) | indexed
  
• content_html
  The contents of the message.
  text