Now you can learn this page what is best place to put keyword and where your keyword are put on a webpage its is very important your keyword ranking. For example in most search engine placing the keyword in the title tag ,heading tag will given it more relevancy.
It is used to define title for the web page that will be visible in the title bar. It must be define inside of <head> </head> tag. Title is best and first place to define your keyword.
H1 tag is very important place to put keyword. And you can never use multiple time h1 tag in one page. other wise google search engines penalized for this.
Meta tag is very important place to put your keyword. Meta tag must be defined with in <head> </head> tag.
<meta name="description" content="Best Tutorial site JavaTportal" />
<meta name="Keyword" content="html" />
Now this is very important in seo image alt tag If in your web site have any image so main points for use image name and alt tag. And image name must be logically or readable name with your keyword.