What are Robots?
Robots or Search Engine Robots or Spiders are simply programs developed by various Search Engines.  The goal of these Robots is to scour the internet for as much information as they can get their "hands" on and load it into their bank of information.

What is a Robots.txt file?
A Robots.txt or Robots files is a file placed on a website that will tell the Search Engine Robots (see above) what pages in your website they should or should not view. 

What is a Site Map?
A Site Map is a file placed on a website that will help show the Search Engine Robots all of the pages of your website.  This is a very important file as it will help the robots find files that may be buried very deep within your site.

What are SERPS?
SERPs is an acronym for Search Engine Results Page

What are Metrics?
Metrics are measurable statistics or actions used to show success, or lack of, within a website.  Metrics can include; visitors, conversion rate, page views per visitor, and more

What are Meta Tags?
Meta Tags are pieces of coding used to help the Search Engines distinguish what each of your pages are about including the relevant Keywords. 

Meta Tags include:
Title Tag:  Coding that is used to alter a specific page's Title.  This is the text that is at the very top left of your browser while viewing a webpage

Meta Description: Coding that is used to alter a specific page's description.  This is the text that is usually displayed in the SERPs and shows what the page is about.

Meta Keywords: Coding that is used to help the Search Engine Robots distinguish the relevant keyword phrases associated with a specific page of your site