Android Studio: what does the green dot mean in the "Run" button?
<p>What does the green dot that sometimes appear inside the <code>Run</code> button mean, exactly?</p>

<p><a href="https://i.stack.imgur.com/DgufR.png" rel="noreferrer"><img src="https://i.stack.imgur.com/DgufR.png" alt="green dot inside Run button"></a></p>