Muthu Kumar Email marketing is one of the most effective ways to boost sales, and with an opt-in email list, you can send messages directly to your customers on your terms and at your convenience, rather than having to wait on someone else’s schedule to announce... moreEmail marketing is one of the most effective ways to boost sales, and with an opt-in email list, you can send messages directly to your customers on your terms and at your convenience, rather than having to wait on someone else’s schedule to announce promotions or sales. Here are five benefits of opt-in email marketing that can help your business grow.