Please do not add inappropriate external links to Wikipedia. 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. Thank you. Materialscientist (talk) 11:58, 9 January 2017 (UTC)
Please stop adding inappropriate external links to Wikipedia. It is considered spamming and Wikipedia is not a vehicle for advertising or promotion. Because Wikipedia uses nofollow tags, additions of links to Wikipedia will not alter search engine rankings. If you continue spamming, you may be blocked from editing Wikipedia. Materialscientist (talk) 12:08, 9 January 2017 (UTC)
You may be blocked from editing without further warning the next time you insert a spam link. Persistent spammers may have their websites blacklisted, preventing anyone from linking to them from all Wikimedia sites as well as potentially being penalized by search engines. Materialscientist (talk) 09:56, 11 January 2017 (UTC)
- Do not use references that offer commercial products - you were adding those with every edit of stairs. If you can't properly source information, don't add it here. Materialscientist (talk) 10:19, 11 January 2017 (UTC)