Hi there, if you go to the clubs using this link http://www.wattpad.com/clubs select the category of your story. Pinned near the top are guidelines - read those first.
Pinned above that is "Share A (whatever) Story Here" or similar. You can promote your story there rather than using the comments on other people's stories to try and find readers. Most people don't like it when you do that as it's seen as disrespectful.
Thanks and welcome to Wattpad.
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