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Your keywords in the page position the more before the better, as to not in each paragraph have your keywords, depending on the length of your page text. (There are individual sites, in the <html> code before adding some keywords, this method for search engines, is not used).
If there is a large number of hyperlinks in the body, each link text written "Click here ...", the results of the search engine may mistakenly think that this large number of "point this view" four words is your keyword. Therefore, when multiple links appear on a page, it is best to write the link title appropriately, using a different color or underline to indicate the link.
A picture is a blank for a search engine. You can make a difference by using the ALT tag in the image's code. The ALT attribute uses your keywords, and search engines can often crawl to them.
Key words in addition to the need to appear in the title, but also need to be in the entire page with a certain frequency appear. You need to arrange keywords in headings, paragraph content, (text content) headers and tails, alt tags, and even <comment> tags that don't appear. These keywords are not necessarily one, but a group of highly relevant words. For Google, analysis shows that the home page requires 7% to 10% of the keyword density. In addition, according to Addweb's study, the key words in the home page appears in the frequency of 8 to 10 times advisable.
Of course, you must be careful when you increase the density of your keywords, use certain techniques instead of sheer keyword stuffing, or you may be punished for spamming (cheating) by Google.