Change Data Capture in Trigger
A salesforce app is a set or group of tabs that are used to create certain functionalities.
How to create validation rule
Validation rules validate if the user entered data in a record meets the standards you define before the user can save or update the record.
Creation of text email template
Email Templates are designed for consistent mails so as to increase productivity of the respective organization or company.
Creation of app in salesforce
A salesforce app is a set or group of tabs that are used to create certain functionalities.