Keywords are phrases you want your website to be found under. Often corporate climates force people to refer to things using special phrases. Keywords are not about what you call your stuff. Keywords are what you think or your prospective site visitors may type in a search box.
Focusing a Keyword
When people tell you to target the word "free" they are out of their minds. The single word is too general and has too much competition. I just did a search on Google! for "free" and it returned 3,800,000,000 results. Single word keywords are usually not well targeted and hard to obtain. Longer keywords are easier to rank well for and typically have better conversion rates.
A longer search phrase is also associated with better targeting and increased consumer desire. Some people say shorter keyword searchers are shoppers and longer keyword searchers are buyers. As you add various copy to pages you are more likely to appear in search results similar to your keywords which do not exactly match your more general keywords. Most good keyword phrases are generally 2 to 5 words.
Simple Steps to Check the Keyword Density
Keyword density is always expressed as a percentage of the total word content on a given web page
Common Keyword Problems
There are a few common problems with keyword selection that should be avoid.
The search terms people type are called keywords and the combinations of keywords are keyphrases