Single-Store Mode is disabled as default that leads to show a scope indicator whenever each configuration setting. Therefore, let enable single-store mode to simplify the display by turning off all Store View options and scope indicators if your Magento Community 2.0 installation has only a single store and view.
Learn how to enable single-store mode simply by following steps:
Stores. Then under
Single Store Modesection.
Cache Managementlink in the system message at the top of the page
Actionsset to “Refresh,” click
Ref: Magento 2 user guide
It comes to the end of tutorial: How to enable Single Store Mode in Magento 2.