Fill in ALL fields or it won't work. If you don't want some of the tags after you generate them, just cut the parts you can't use or don't want. This form gives you a lot of tags. As an example, "page author" will show your name and allow searchers to find you by your name if you are found on other sites or pages.
Use the robot revisit tag and try to change and rearrange your site content to justify it. For the "robots" tag, choose "all" (=index and follow) or "index" your page (otherwise why would you submit it), or "follow" to just check your links and index them. Note: Robots don't always behave the way the "should", but it helps to tag correctly.
The tags with the * are essential, make sure you at least use them. Remember to fill in all entries and then edit after you copy them to your computer from the page you will see when the tags are created.