just go to admin=>plugin and enable Basic AdSense at the top of the page.
and then go to layout to add a widget anywhere you like.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.