Like to understand the meaning of few inbound rules

here is 3 inbound rules. please explain the objective and meaning of 3 inbound rules. tell me what 3 below rule will do. thanks

<rule name="Country redirect" stopProcessing="true"><match url="^[a-zA-Z]{2}/$" ignoreCase="true" /><action type="Redirect" url="/" /></rule><rule name="Some rule"><conditions logicalGrouping="MatchAny"><add input="{URL}" pattern="^.*\.(ashx|axd|css|gif|png|jpg|jpeg|js|flv|f4v)$" negate="true" /></conditions></rule><rule name="Rewrite language code"><match url="^([a-z]+)/([0-9a-z]+)" /><action type="Rewrite" url="/{R:2}.aspx?lang={R:1}" /></rule>