I've been working on my own site project for some time, and now I'm making fixes and updates, working out bugs, etc., with hopes of testing it live in the near future...

1. I have a question about the <meta name="robots" content="?"> tag, of which I know there are a few options for the content part, is it necessary to specify this in my web pages?
2. What exactly do these robots do?
3. Are there certain types of sites that specifying content="none" would be of benefit?
4. Besides analyzing a page, can they get into the java classes/servlets I've created for use on my site?
5. Can they retrieve personal info if there's code in my pages that actually do so?
6. Do I have reason to be concerned about these robots and should I specify the content in the tag as "none"?

Any input is greatly appreciated,
Thank You,
-Love2Java