1. The Keywords meta tag. Although, little of the meta tags should be used. It only takes only few seconds to put them into your HTML, and they do no harm to your website. There are evidences that some search engines might use it to rank your website according to your keywords.
2. The TITLE tag. This is the title of your web page, and should contain the primary keywords for that page. Each page should be written round one or two primary keywords that relates to the subject of your website or niche. Title tag also is the introduction to your website or webpage to the users.
For example, if your niche is about link building, then the primary keyword for your home page should be 'link building'. You could then have a number of 'silos' with a main page title. The title of one of the main silo page could be 'webpage optimization' and that of the first page title of that silo could be 'Backlinks'. These are the primary keywords for their respective webpages. Another silo could be 'Page Rank', with that as the primary keyword for the main silo webpage, and that for your first sub-page in that silo could be 'Search Engine'.
Each page must have one primary keyword that should be included in the Title tag for that webpage. These Title tag does not appear in the body of the article, but are there in the HTML between the two HEAD tags in your HTML.
3.The H tag. These are called heading tags, with H1 being the most important of them all. The heading for each main section in your webpage should be contained within the H1 tags. Subheadings, containing secondary keywords, should be contained within the H2 tags, and so on for other heading, if present in the webpage.
4.The ALT attribute. Use 'Alt = ' within the Img tags of your images and graphics on your website. This lets the search engine crawlers to know what the graphic is all about. Search engines do not read graphics so the Alt tag attribute offers you the chance to use your graphics meaningfully with respect to Search Eengine Optimized web design.
Currently, These are the basci issues to a webdesigning start. That's all you have to worry about regarding the basic HTML tags. Your text formatting can be used to emphasize the search engine crawlers for what important text is there on your webpage. Thus, if you use bold text, underscoring or italics, they indicate the importance of the words and phrases on your webpage. Thus, use the and html tags for your headings and in website content to make it look good and also to create a lure to search egine spiders and let them easily crawl your website by poviding attractive and optimized tag as your direction signboards.