question regard current for ground object.

Meet modi

hello all,
Hope you stay safe.
I have question regarding shortcut key insert plus b.
it says speak current for ground object.
whats the mean?
i tried to apply but i am little bit confuse.
it announce whole screen suppose i open word.
so it says document 1 micro soft word, riben tab quick tab ETC so if any can explane proper way please

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