Every page on your site should have a unique tag with the target keywords in it.

你网站上的每一页都应该有一个唯一的包含着核心关键词的标签。

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On-Site SEO: are the things that you can do on your site, such as: HTML markups, target keywords, internal linking, site structure, etc.

站内(On - Site) SEO：能在你的网站上做的，比如：HTML标记，关键词，内部链接，网站结构，等等。

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While keyword research is not determined solely upon search volume it certainly is a major playing factor in the final selection of target keywords.

不过关键字的研究并不是由搜索量唯一确定的，尽管它在最终的目标关键字选择中扮演着最重要的角色。

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With AdSense for Games, advertisers can target campaigns based on keywords, genres or even specific games.

FORBES: Advertising

He simply instructs his readers to target Facebook ads by listing keywords, such as blogger, editor-n-chief, correspondent, news editor, writer, columnist, and dozens more in the interest field.

FORBES: How To Triple Your Success Using Social Media Advertising Platforms

ISP's network scans passing web pages for keywords that are then used to target ads.

ECONOMIST: Behavioural targeting