Hello, and welcome to Wikipedia! Thank you for your contributions; however, please remember the essential rule of respecting copyrights.  Edits to Wikipedia may not contain material from copyrighted sources unless used with permission.  It is almost never okay to copy extensive text out of a book or website and paste it into a Wikipedia article with little or no alteration, though you can clearly and briefly quote copyrighted text in the right circumstances.  Content that does not comply with this legal rule must be removed. For more information on this, see:
Wikipedia:Copy-paste
Policy on copyright
Frequently asked questions on Wikipedia's copyright policy
Policy and guideline on non-free content

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Simple introduction
Help pages

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