Placing keywords Correctly

Place keywords at the beginning of your content and repeat them. By doing so Adsense will get what is the keyword of your post and put some relevant ads for you. But repeating keywords too many times sound awkward to a reader and may also be considered spam by search engines, attracting penalty.

Instead of repeating the same keyword too many times on a page, try to use synonyms and related keywords. For example, instead of repeating "idol" 20 times, occasionally use "paragon" or "ideal" instead.

Try to use html "strong", "em", "bold" and "italic" to give weight to the keywords as this would help Adsense to recognize keywords of your post.