Baloch Mirha

To develop the visibility of a start-up / new product on the markets, email campaigns are one of the best ways. I want to launch a campaign (but i am new to this) and I would like to have your advice and feedback on how to make the operation successful: 1 - What are the best tools to carry out the operation? What are the best tools to carry out the operation and measure the return on investment? 2 - How do you define a relevant and not too generic content? Don't hesitate! I'm curious for any advice