Straight from Google

While SEOs can provide clients with valuable services, some unethical SEOs have given the industry a black eye through their overly aggressive marketing efforts and their attempts to manipulate search engine results in unfair ways.

Google, Inc.

 

If you want to rank higher on Google, why not go directly to the source? Below is a list of pages by Google, Inc., in regards to SEO.

Google Webmasters & Search Console

Google SEO

Matt Cutts (Google Engineer & Spokesperson)

Other Google Resources

https://support.google.com/analytics/answer/1033867?rd=2

https://support.google.com/analytics/answer/1033867?hl=en&rd=2

https://adwords.google.com/ko/KeywordPlanner/Home?__u=5459506512&__c=6822502092&authuser=0#start – Google Keyword Suggestion Tool – Get keyword suggestions and search volumes

http://www.internetmarketingninjas.com/search/ – Search Combination Tool – create a combination of terms to search on the search engines fast

SEM Rush – Research specific keywords or domains/competitors’ traffic and rankings

http://www.5minutesite.com/local_keywords.php