From the chatiquette:
Don't promote your own content too much. Promoting your own content is absolutely OK, but there is definitely a point at which it becomes excessive. Avoid promoting off-site material unless it's related to the topic of discussion. Sharing posts that you want feedback on is perfectly fine, but sharing things just in the hope of getting more upvotes is not. The rule of thumb to follow is "If somebody else had posted this, would I still really want to share it?" If the answer is yes, then go ahead. More guidelines on self-promotion.