MuleSoft Composer for Salesforce is a new solution that allows users to connect apps and data to Salesforce without writing code. It features streamlined sales operations through integrations between systems like NetSuite and Salesforce, improved collaboration through integrations with tools like Slack and Google Sheets, and improved employee experiences by updating profiles across systems like Workday, NetSuite, and Salesforce. The document also describes how to use pre-built connectors for apps like NetSuite, Workday, Tableau, Google Sheets and Slack and provides use cases for unlocking data, automating processes, and building scalable integrations between multiple systems through MuleSoft Composer in Salesforce.