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Selecting a web design company is very important for promote your site online and more attractive. Before selecting the company you should check their portfolio and customer support. Website review...

yes, by using <a> tag you can give link to the keywords.
For Example:

<a href="best-hostings.in/">Best Web Hosting</a>

URL Masking means that the visitors to the domain name will be forwarded to your destination website, however the URL in their browser address bar will remain the same.

Did you used duplicates meta tags. Can you send your site url?

Alexa is more important. Alexa is a web directory and provides free traffic metrics, search analytics, demographics, and more. Alexa ranking depends upon how many visitors you get daily.