WEB SERVER NOT ACCESSIBLE
If your web site is not accessible or server is down on most of the occasions then you are gaining negative rankings.Other issues such as slow server response times can have negative impact on your rankings. Search engines have to crawl content within fraction of few seconds, and they cannot afford to wait 5-10 minutes if your web server responds slowly.
Use a reliable Web Hosting provider
2) DUPLICATE CONTENT
Search Engines hate duplicate content, and if most of your website content is filtered out as duplicate then it will prove detrimental to SEO health of your website seo health
Dont use duplicate content. If you have inadvertently copied content which you found useful, then dont forget to add a link pointing back to the original document url.
3) EXTERNAL LINKS TO BAD NEIGHBOURS/ SPAMMY SITES
If your website has external links which are pointing to low quality websites/spammy websites/ or websites with duplicate content, then you are heading at DEAD-END seo linking
Special Note:On the other hand having quality external links helps to improve SEO rankings. seo linking
4) DUPLICATE TITLE/META TAGS ON SEVERAL PAGES
If your website has several pages with duplicate meta/title tags then it will lower your search engine rankings. Therefore your must ensure that most of your pages have unique TITLE / META tags.
Also avoid internally duplicated content as well as duplicate meta tags
5) KEYWORD STUFFING
Artificial Keyword Stuffing is used in order to inflate keyword density for a particular set of targeted keywords. In reality it results in lower SEO rankings. Therefore keep your keyword density natural and abstain from artificial keyword stuffing aimed at particular set of keywords.
Search Engines can easily detect artificial keyword stuffing aimed at particular competitive keywords.
6) LINK EXCHANGES
Search engines do not entertain websites which indulge heavily in link exchanges. However, if you do link exchange carefully with related business websites then it can help. However, most of the websites should avoid link exchanges.
Special Note:: Avoid Link Exchanges unless the other website owner is your business buddy seo linking
7) Inbound links from SPAM sites
Inbound links from SPAM websites could have negative impact on your TRUST RANK. However, there are cases where certain black hat SEO”s black hat seostart indulging in FREE SPAM PROMOTION for their competitors.
If there is no previous history of SPAM on your website, then search engines will simply ignore the negative spam link building. On the other hand, if certain elements of spam are included/visible on your website, and you have back links from spammy sites, then it could result in a penalty.
Thumb Rule to avoid being penalized
Case 1 : If your website has nothing to do with external links from SPAM Sites, then search engines will simply ignore them. If you can bring down rankings of genuine websites then every new spammy business website would have brought down rankings of existing websites within their business niche.
Case 2: If your website has elements of SPAM present within the website and has a previous history of being associated with SPAMMY sites then you should put R.I.P banner
on the homepage of your website.
Special Note: – There are some unfortunate webmasters s who think that having a back link from low page rank (PR 0) webpage is equivalent to having a back link from SPAM site. Your website”s Page Rank (Google Page Rank) has no relationship with the actual SEO rankings of your website.
http://www.lebanonwebsitedesign.com/articles/negative-seo-ranking-factors.html