Best Answers on Google Webmaster Help

This is a list of my best answers on the Google Webmaster Central Help Forum.
I keep track of these so I can learn where my experience is most helpful and to generate ideas about helpful articles I could write.

What are the main things to Check to ensure a Good ranking on Google Search?!topic/webmasters/PvhRSlpxQTg
E-mail Addresses Showing up in my URL causing 404 Errors?!topic/webmasters/q36f5PRGtFE
Does Google know everything? Do I need to pay Google if I want to use their name in slogan?!msg/webmasters/XMOfRkyubSQ/ywX0...
Identical pages with separate Canonical tags not ranking on Google!topic/webmasters/fKhF-_5RwD0
Googlebot can't access my site, receiving a "Temporarily unreachable" error message when trying to fetch page.
Why isn't my ecommerce website in the top ten results?!topic/webmasters/YbFWnRdVjgI/di...
Why does my website's Alexa rank jump around so much?
Why do instagram profiles show "&" instead of the proper ampersand "&"?!topic/webmasters/-GIs7_zwLC4/di...
Do the "mobile changes" on April 21, 2015 impact desktop search?
Trouble getting pages indexed with hand coded site and duplicate content issues.!topic/webmasters/JQqEiVpRsGw
Are galleries and photos on Photography websites considered thin content by Google?!topic/webmasters/0Gfni1drIjU
How do I recover from a thin content penalty?
This answer was a bit tongue and cheek, but sometimes webmasters are just running terrible websites hoping to get rich with low-quality content. This may have worked in the 90s but it will certainly not work now.