What does the columns in Report mean ?

The report is a simple table with these informations :

• Keyword : the keyword analyzed
• Volume : The volume of the keyword based on multiple data provider
• Golden Ratio : The calculated Golden Ratio (for Allintitle:) or the number of results (For Intitle:), if it's green it's a very good keyword to target, grey an okey keyword, and red a difficult keyword
• CPC : Cost per click for Google ads, the higher the more competitive the keyword is to run ads on, it should correlate to difficulty in the serp (lower the better)
• AVG BL : Average backlinks the top 10 result has for this keyword in Google
• AVG RD : Average RD the top 10 result has for this keyword in Google
• Trend : The trend of the keyword for the last 12 month