If I is using adsense ads inserter and I want to limit 2-3 ads only in one post them how can I do it.
To limit, use pro version.
Any other alternative
WHy not use Advanced Ads plugin. It allows to limit ads on a page, also other conditions like type of posts and pages and also allows you to display ads according to the user type like new visitor and returning visitor.
I am not in the condition to buy it. How much it costs
It is completely free and I am using it since 2 years
I recommend Ads for WP - Advanced Ads & Adsense Solution for WP & AMP
and it has multi-functional premium features for free.
Try it, then say be, is it best or not?