In the Palaeolithic Age, man used crude stone tools and weapons, and led a hunter-gatherer life. This period is also known as the 'Old Stone Age'.
In the Mesolithic Age, man used microlithic tools, which were bound or linked to handles. This period is also known as the 'Middle Stone Age'.
In the Neolithic Age, man used polished stone tools for agriculture and other things, domesticated animals, and led a settled life. This period is also known as the 'New Stone Age'.