It is very important to retain customers. This is because the company can save advertising costs about their products and the company name itself. A company also invests in retention strategies. Marketing plans and strategies are necessary to retain customers. You can also see the strengths and weaknesses of your plan and strategy. If your customers increase, then you can proudly say to your marketing team that your plan and strategy are effective. The only goal your marketing maintains is profit increase. You will have a good turnover if your marketing also invests in a retention strategy. One effective way of retaining customers is to give them discounts. It is also good to get their addresses so you can remain in contact with them. You can send emails to your customers whenever there is a promotion. And even advertize through social media your new items to your customers who are loyal to you.