大致上的规则就是：关键字在你所有页面复本中出现的几率应至少大于5%——最理想状态是：每一篇到两篇文章中就能出现一次关键字。
The % of times it appears has started to have less an impact, but the general rule is your keywords should make up around 5% of your copy - or ideally once every one to two paragraphs.
你最后一次更新你的关键字是什么时候，你知不知道哪些是你的竞争对手要瞄准的？
When's the last time you updated your keywords, and do you know which ones your competition are targeting?
搜索用户很少通过第一次搜索就能到达你的网站。 因此，SEO如果说 可以通过一次优化就能让用户搜索某些流行关键字（词）到达你的网站，那可能是在骗自己。
Searchers rarely ever convert on the first click and thus, SEO campaigns that merely target a few popular keywords and call the task finished may be fooling themselves.
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