Implementing nesting involves using HTML and CSS to create a hierarchical structure within the email template. Here are some steps to follow:
Start with a basic HTML structure, including the <!DOCTYPE html>, <html>, <head>, and <body> tags. Use <table> elements to create the main layout. Tables are widely supported across email clients and help maintain the structure. Within each table cell (<td>), you can nest additional tables to create complex layouts. Apply inline CSS styles to ensure consistent rendering across different email clients. Test the email template on various devices and email clients to ensure it displays correctly.