Not An Answer / Is a Comment
Stack exchange is a bit different than other sites. Most other sites are set up to be a forum, where people can have discussions with each other. Stack exchange isn't a forum, rather it's a method of sharing questions and answers with other people who visit the site.
When you post a response to a question, it is expected to be a direct answer to the question. There are comments and chatrooms that allow you to converse with other members, but both will require just a little bit of reputation in order to do so. Reputation is gained by having a question or an answer voted up by other members of the site.
If you find that yours, oryour answer (or someone else's, answer) is a better fit as a comment, moderators have the ability to convert answers into comments,comments; simply flag the answer as being "Not an Answer".
Similarly, if you've come across a question because you want to know the answer to it as well, it's best not to leave a comment as an answer saying so. The proper thing to do is wait for people to answer that question.
If you find that the answers do not help you, a bounty can be placed on the question to encourage more people to answer it (If you don't have the reputation to place a bounty on the question, it won't hurt to ask someone to place one for you).
I don't think [this is an answer](http://meta.pets.stackexchange.com/a/789/481\)