SEO stands for Search Engine Optimization and It’s Play a Very Crucial Role in Ranking of Your Website and Blog Post. Without doing SEO You Cant Rank in Any Search Engine. So It is Very Clear That You Are Not Going To Earn Anything. 

SEO Can Be Determined as On-Page SEO, Off-Page SEO and Technical SEO. You have to be Master in This Then Only You can Make a Passive Money From Your Blog. 

Optimizing Your Blog Post As Well As Your Website For any Search Engine is Called On-Page SEO. On-Page SEO Includes Blog Layout and Structure, Post Layout, Image, Title, Heading, Sub-Headings, Meta Tag, Meta Description, Permalink Setup, Internal and External Linking. 

Building Blog Authority via Guest Post, Comments, Outreach is Called Off-Page SEO Which also Include Blog Promotion By Various Method Like Social Media, Email Marketing, Running Ads and Many More. 

Technical SEO is Advance Part of On-Page SEO. I have Written a Detailed Article About Technical SEO, Click To Read.

If You Are Looking For Best SEO Guide and Tutorial Then Checkout Below Articles!