Although running Nmap with the default settings is very easy, it leaves an amazing amount of Nmap functionality unused. Nmap includes FIFTEEN different Nmap scan methods, and most people only use the default! There’s a lot of power just waiting to be tapped.
If you’ve ever run Nmap alone on the command line with simply a target IP address, then you’re probably using an inefficient method of performing your Nmap scans. Nmap includes many different command line options so you can tailor each scan to the results that you need.