License prefixes help to easily identify what product the license key belongs to. For example, if you enter &lt;b&gt;SPBAS-&lt;/b&gt; as the license prefix the resulting key might look like this:

SPBAS-1a2b3c4d5e6f7g

To break this down:

&lt;b&gt;SPBAS-&lt;/b&gt; license prefix
&lt;b&gt;1a2b3c4d5e6f7g&lt;/b&gt; license length