Once you submit your store to a search engine(such as google webmaster) or some other well-known sites, usually a verification process is needed. In that case, we recommend you use a "META TAG" to reach this goal.
There are 2 different ways to edit your store's meta tag:
1. Go to miiduu app store, install the meta tag app, then go to menu: app store->installed app to configure this app to add the related meta tag.
2. Go to menu: "Design"->"Theme"->"Edit HTML/CSS"Template Edit to add the related verification code to your header template.