An Email Service Provider (ESP) is a software tool that assists businesses in sending and managing email campaigns. ESPs provide different features, such as email design templates, list management tools, and analytics.Choosing the right ESP is crucial for the success of email marketing campaigns for e-commerce businesses. ESPs can affect the effectiveness of email campaigns, customer engagement, and revenue. By selecting the appropriate ESP, businesses can improve their ability to acquire and retain customers, increase revenue, and improve profitability.