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In every page of your website there are seven key places where keywords (the words people might search on to find your site) can appear in order to improve its findability.
1: PAGE TITLE
The page title appears at the top of the browser window or on the tab of a browser. It is specified in the <title> element which lives inside the <head> element.
2: URL / WEB ADDRESS
The name of the file is part of the URL. Where possible, use keywords in the file name.
3: HEADINGS
If the keywords are in a heading <hn> element then a search engine will know that this page is all about that subject and give it greater weight than other text.
4: TEXT
Where possible, it helps to repeat the keywords in the main body of the text at least 2-3 times. Do not, however, over-use these terms, because the text must be easy for a human to read.