- Create unique, accurate page titles using
<title>tag placed within the<head>tag. - Please bear in mind that Google does not recommend putting keywords into the
titletag. So it is very good practice to make sure that your title effectively communicates the topic of the page's content. - Use the
descriptionmeta tag (<meta name="description" content="">) to gives any search engine a summary of what the page is about. It is very good practice to use unique descriptions for each page. - Use the
keywordsmeta tag (<meta name="keywords" content="">) to give page related keywords.
Please have a look at Matt Cutts Blog page: Gadgets, Google, and SEO where Matt describes in details importance of correct informations in
alt and title attributes of an image tag.