Note: The personal coupon you create for your customer (for free eBooks) can be set with or without an end date. If you do not use an end date, simply check your coupon codes at the end of the month. If some require updating, simply delete them and re-create with the same code, or up the download limit if all their downloads have been used (e.g. extra 10 for the following month).

Your other coupon codes (e.g. PLR Silver Digital, PLR Gold Digital, etc) that are already set in your coupons are for selling digital products at discounted prices. Basically, it allows your members to receive special discounts on any products that are not eBooks, which you may end up selling in the near future. If you do ever change this coupon code for digital products, be sure to change the code in your plan Thank You message by doing the following:

Dashboard > Pricing Plans (left side) > Select a plan (edit) > Scroll down > Customize a Thank You Page (edit) > Update the message (insert your new coupon codes)