I hired a web master, who utilized a SEO specialist as well as a developer to maximize the site, utilizing testing and various other tools I knew little about.  

I've been using Elance for years and I've been able to find a web master and a VA on the site who I still work with on a regular basis (overall, I've probably used Elance for 15+ projects)...the site makes it very easy to track time, hire, view proposals, and pay your contractors.

But webmastering is a big and complex topic.

:roll: I cannot seem to attach the screen shots using the Advanced Post tools so will send to the BP Webmaster

Please submit any error reports to our webmaster at biggerpockets email address.Thank you.

I know way to much on this topic, owned one of the top 3 keyword research websites back in the day, and wrote and sold a few patents on reverse engineering googles ranking  algorithms, and a lot more.The bottom line is SEO is a continues process, there is no one hit process as the target is always moving.For those who want to keep up with things, check out SEOMoz blog, Search Engine Land, and Webmaster World.SEO is something you have to live eat and breath if you really want to be good at it.

This guy obviously not following the google webmaster guidelines.

I would try using Google Search Console (f/k/a Webmaster tools).

As a webmaster, I take effort to strip all HTML for security issues - - I am sure Zillow is doing likewise.

If you want to get started in SEO, I would recommend reading about Google's webmaster tools and their webmaster tools help.