'What is this button called? What does it do?

What is this button called? What does it do?

In the displayed screen, even though the "Data Conn." shows dim, when I click that button I see it as "Bright" - Which view to believe?

Thanks much.

android

Solution 1:^[1]

It is google lens app logo you can do many fun things with this like scanning text from image.

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Solution	Source
Solution 1	Manjeet deswal