If you own a website, then you should consider putting meta tags on your website. It will be more effective if you have different meta tags for each page on your website. Meta tags can include: keywords, site description, author, and more. When you specify keywords in your meta tags, the search engines will ignore them if the keywords are not in the body text.
The most used meta tag type is the site description and the keywords. You can make meta tags yourself, or you can use free meta tag generators. Here is the one that I prefer:
You can find more information about meta tags at Google Webmaster support.