User talk:Learn Physics About

Welcome!
Hello, Learn Physics About, and welcome to Wikipedia. We appreciate encyclopedic contributions, but some of your recent contributions, such as your edit to the page Optics, seem to be advertising or for promotional purposes. Wikipedia does not allow advertising. For more information on this, please see: If you still have questions, there is a new contributors' help page, or you can. You may also find the following pages useful for a general introduction to Wikipedia: I hope you enjoy editing Wikipedia! Please sign your name on talk pages using four tildes ( ~ ); this will automatically produce your name and the date. Feel free to write a note on the bottom of my talk page if you want to get in touch with me. Again, welcome! —C.Fred (talk) 20:11, 13 April 2018 (UTC)
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April 2018
Please do not add inappropriate external links to Wikipedia, as you did to Optics. Wikipedia is not a collection of links, nor should it be used for advertising or promotion. Inappropriate links include, but are not limited to, links to personal websites, links to websites with which you are affiliated (whether as a link in article text, or a citation in an article), and links that attract visitors to a website or promote a product. See the external links guideline and spam guideline for further explanations. Because Wikipedia uses the nofollow attribute value, its external links are disregarded by most search engines. If you feel the link should be added to the page, please discuss it on the associated talk page rather than re-adding it. Do not replace references in articles with links to your website. —C.Fred (talk) 20:18, 13 April 2018 (UTC)

Inappropriate username
Welcome to Wikipedia. I noticed that your username, "Learn Physics About", may not comply with our username policy. Please note that you may not use a username that represents the name of a company, group, organization, product, or website. Examples of usernames that are not allowed include "XYZ Company", "MyWidgetsUSA.com", and "Foobar Museum of Art". However, you are permitted to use a username that contains such a name if it identifies you individually, such as "Sara Smith at XYZ Company", "Mark at WidgetsUSA", or "FoobarFan87".

Please also note that Wikipedia does not allow accounts to be shared by multiple people, and that you may not advocate for or promote any company, group, organization, product, or website, regardless of your username. Please also read our paid editing policy and our conflict of interest guideline. If you are a single individual and are willing to contribute to Wikipedia in an unbiased manner, please request a change of username, by completing this form, choosing a username that complies with our username policy. If you believe that your username does not violate our policy, please leave a note here explaining why. Thank you.