How to start with SEO?

Start by reading/watching tutorials and testing. Nothing beats experience. Experience teaches faster and better than anybody.
 
Best place is really right here, when you feel confident start testing, it is really the best teacher
 
It depends on what you need to do. You can start with some basics and then try to read something more specific. But sometimes it's better to focus on selling if it is your main field. There are a lot of really good marketing companies that can help you with SEO.
 
Go to the youtube there are thousands of videos from where you can start learning seo from basic
 
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