Wording For Thank You Tags Use Of Meta Tags In The Process Of Search Engine Optimization

Use of meta tags in the process of search engine optimization - wording for thank you tags

that the rules of R and the process of creating a good meta tags to optimize an effective website. More precisely, if one uses a word twice or more in the meta keywords or meta tag is a negative track after Google? Google is not clear on this issue. Help Plz.
Thank you in advance.
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