Description meta tag and keyword meta tag is not widely utilized by major search engines these days. However since some search engines give it due importance it is important that you include them in your pages.
Tags are hidden from the user in HTML.
Description tag is hidden from the user and provides a description for the page in question to the search engines to use. Same way keyword tag is used by the site page to tell the search engines for what all keywords, they should index the page for.
Make proper headlines. Main & Subheadings.
While writing content, make sure it has proper headlines. It is important for two reasons. Headlines especially towards the beginning of the page are seen with search engines with much importance. Head lines in the rest of the page also will be given importance by the search engines.
With regards to the viewers, proper headlining will give them good directions while reading through. On the web visitors don’t have much time. Unless you freeze the moment you are not going to be able to retain them.
Hence much care when you use headlines and use headlines which make real sense.
About ALT tags:
ALT tags help index graphics as graphics itself can not be indexed by search engines. Also, this very useful for visitors with disabilities as tags help them understand the text. ALT tags can be used to enter some keywords too as most search engines make it a parameter for ranking the page.
Next : File types that are indexed
Quotable Quotes:
“Free advice costs nothing-
unless you act on it!”