This procedure is necessary only if you defined more than one attribute and column heading in Step 2 and now want to sort the results alphabetically or numerically within one of those columns.
For example, let's say you specified two different attributes to display in the query results: the IP address and the processor type of each returned computer. In Step 3, you could sort alphabetically by processor type in the results.
If you skip this step, the query will automatically sort by the first attribute selected in Step 2.