Hi there! If you are reading this, then I probably tagged an article you've created for speedy deletion. Below you will find a list of likely reasons why your article is tagged for speedy deletion. Remember - this list does not contain all the reasons an article would be tagged for speedy deletion. This list only contains the most common reasons. For other reasons, see Wikipedia:Criteria for speedy deletion.
The article does not credibly indicate the notability of the subject (CSD A7)
The most basic standard for inclusion in Wikipedia is notability; whether or not the subject has received attention from the press or other reliable sources. Wikipedia is not the place to establish a subject's notability, which include bands you started with your friends (even if you're close to being noticed, signed or gigged) , your website, your best friend, or that coffee shop you go to everyday.
For example, let's say you're writing an article about an actress named Danielle. Creating a page that just says "Danielle is an actress who is very talented." doesn't provide a starting point for others to build on. Who is Danielle? What does/did she star in? Who says she's talented? What will she star in? How do we find more info on her?
If your article is not yet complete, you might want to put {{inuse}} at the top of your article.
Once again, let's say you're writing about Danielle the actress. Creating a page with the only content being "Danielle" or links to a bunch of websites related to Danielle will be deleted. In addition, a page with the only content being "She is an actress" will also be deleted.
The article does nothing but promote an entity or product (CSD G11)
Wikipedia is not an advertising service, and the community is very sensitive to being treated like one. If your article reads like an advertisement, uses a promotional tone, uses marketing terms like "dynamic", "capable", "world's leading enterprise" to describe a company, or says how a website is "one of the fastest growing on the Internet", it'll probably be deleted.
This also includes companies you are not associated with. An overenthusiastic analysis of a company by a fan can be mistaken for something drafted by that company's marketing department. If this is the case, I'm sorry that you're article has to be deleted; you just need to tone it down next time. Also see Notability above.
Pages that contain large amounts of profanity, say stuff like "Lauren is hot", and contain obvious misinformation will be tagged as either vandalism or a hoax, and will be deleted.
The article was created as an experiment (CSD G2)
You created the page as an experiment. You probably clicked some buttons on the edit toolbar, or posted something like "can I really make a page here". Sometimes it's just obvious it was created as a test. If you created a test page, don't worry; it'll probably be deleted in minutes. Please use the sandbox for any more experiments you would like to do.
The article contains nothing but patent nonsense (CSD G1)
Articles consisting of gibberish, incoherent text with no useful history will be deleted. Please use the sandbox for any test edits.
The article was created to disparage or threaten it's subject (CSD G10)
It's one thing to write an article saying "Lauren is hot". However writing an article comparing her thighs to cottage cheese is another thing. Wikipedia does not tolerate personal attacks against other editors, real people, terrible bands, corrupt companies, or anything at all. It's natural to blow off steam now and then, however Wikipedia is not your punching bag. Attack pages will be deleted.
Now what?
If you do not believe you're article should be deleted, you may add {{hangon}} to you're article (but don't remove the "db" tag) and explain why it shouldn't be deleted on the talk page (click the "discussion" button that's beside the "edit this page" button.)
If you wish to work on you're article after it's been deleted, you can ask an administrator to post a copy of the page in you're userspace, depending on what type of page was deleted. An article about a non-notable subject or a page written like an advertisement is much more likely to be copied into you're userspace than a vandalism page or an attack page. A list of administrators can be found here.
If you're working on an article, you can add {{inuse}} so no one tags it for speedy deletion.
If you're article was tagged for a reason that is not listed here, that reason is most likely listed here.