Hi .. is adding up a Adsense code ok to be placed between a blog post? i am wondering if this has anything to do with SEO. or should i place them over the blog posts? i am confused..
There won't be any change in SEO. Google recommends for blogs to set up a banner ad between first and second post. (see the AdSense Help)
There is no relation between ad placement and SEO. But however the ad placement is very very important along with SEO. So Instead of having the ads between the blog posts you can have it inside the blog posts.
I too would recommend placing Google Adsense inside the blog posts. It will have higher CTR than that of Ads between the posts.
I don't think the ad will perform well if you place it between blog posts but a lot factors have to be taken into account e.g. niche of your website. It could be successful. Never know.
It doesn't affect SEO, it may affect your CTR though. Between posts isn't too bad, but inside the posts may perform better. Good luck