Use an aria-label on buttons to provide context about the data being copied.
<button class="go-Button go-Button--inline go-Clipboard js-clipboard" data-to-copy="hello, world!" aria-label="Copy _DATA_ to Clipboard" data-gtmc="clipboard button" > <img class="go-Icon" height="24" width="24" src="/static/shared/icon/content_copy_gm_grey_24dp.svg" alt="" /> </button>
<button class="go-Button go-Button--inverted go-Clipboard js-clipboard" data-to-copy="hello, world!" aria-label="Copy _DATA_ to Clipboard" data-gtmc="clipboard button" > <img class="go-Icon" height="24" width="24" src="/static/shared/icon/content_copy_gm_grey_24dp.svg" alt="" /> </button>
<div class="go-InputGroup"> <input class="go-Input" value="hello, world!" readonly /> <button class="go-Button go-Button--inverted go-Clipboard js-clipboard" aria-label="Copy to Clipboard" data-gtmc="clipboard button" > <img class="go-Icon" height="24" width="24" src="/static/shared/icon/content_copy_gm_grey_24dp.svg" alt="" /> </button> </div>