Providing a newsletter for your opt-in subscriber list provides many benefits in terms of driving traffic to your site as well as boosting the sales and profits of your company. This is a marketing ploy that will not hugely dent your budget and will also not require many man-hours in developing.
With a newsletter, you can inform the public about your company and products as well as services. You can keep them posted and updated about what's going-on with your company as well as many of your promotions and offerings. With these, you keep on reminding your subscribers that you are still here and are willing to offer them good deals and services.