My new product site is http://www.PDFZilla.com, it can convert pdf files to word, txt, image etc. I ve considered to register domains like pdfconverter.com, pdfconverter.org, convertpdf.com etc but they ve all been registered.... Is there any other way to seo my site with "convert pdf" related keywords? My main domain doesn't contain those words... Is write articles working?
You don't need the keywords in your domain name to be able to seo for that keyword. Having the keyword in your name just gives you a bit of a boost. So far it looks like your website is fairly optimized for 'convert pdf'. You might want to consider rewriting your meta description. Your target keyword should appear closer to the beginning of this tag. It might also help to repeat this keyword in the description. You could also try using related keywords throughout your pages. These days getting rankings is mostly about off-page seo. So don't obsess too much over the on-page stuff. Quality backlinks count for more than anything else, especially when good link anchor text is used.