The SSID is so you cn find your network amongst others. Have you found, sometimes, that more than one wireless network is found? I can sometimes 'see' up to 2 others (neighbours) so a unique SSID will help seperarte them. Also if a hacker can see your SSID then they have an easier task of guessing your router log in name and password. If it's a Netgear it's probably Admin and dmin for e.g.
It's best to set your SSID to something meaningful to you but also to select to NOT broadcast the SSID. As you will already know it then it just needs entering into any other device connected wirelessly to your network.
So, no it won't effect your WPA.