How to make ad slots before and after posting
First, open the Blogger dashboard> click the Themes menu and Edit HTML> Search this code
<b:if cond='data:blog.pageType == "item"'>
<data:post.body/>
</b:if>
- Then add the code below to wrap the banner or ad code
<b:if cond='data:blog.pageType == "item"'>Replace the code marked with your banner or ad code. An example like this, here I use the AdSense In-article code
<div class='adcss ax'>
<!-- Your Ad Here Code Here-->
</div>
<data:post.body/>
<div class='adcss ax'>
<!-- Your Ad Here Code Here-->
</div>
</b:if>
Also add CSS code before </ head>
<b:if cond='data:blog.pageType == "item"'>
<style type='text/css'>
.aadcss{margin:20px auto 0 auto}
.adcss.ax{margin:20px auto}
</style>
</b:if>
Finish, click the Save theme in the template editor. done.