"View any coupon of any type " permission for anonymous reduces the Score in acquia In my e-commerce website, anonymous user can't able to view the add coupon field until and unless I gave "View any coupon of any type" permission. Because its having notice like this: Warning: Give to trusted roles only; this permission has security implications. Acquia Reduced the score of our website.So any other way is there to solve this problem?
The Acquia Insight tool (I am assuming you are referring to that score) is a tool that helps you find potential problems in your website and configuration. It is an automated tool that performs simple checks. It is a guide and a tool. Not exact science. (It could throw a false positive.)

However in my installation of Commerce Coupon 7.x-2.0-rc2, there is also the permission to Redeem any coupon (and the per type Redeem &lt;type&gt; coupons permission). And that works for anonymous user as well. Perhaps you should try that instead?