Empty space on left corner for subsequent new post

You can try inserting this into your css:

#adsense_singlepost_top_square {
    display:none;
}

Thanks Josh for your quick reply. However, I don’t know css but have some knowleage on html codes. Could you advise where I shall insert the codes you suggest. Is it on the text itself or where?

Place it in your style.css file. It is most likely in your theme’s folder. If you click on Appearance => Editor, and select your theme, you should see a file called style.css. Click this file, scroll to the bottom, and paste the code from above on a new line.

to edit style.css
https://DOMAIN/wp-admin/theme-editor.php

Dear Josh, thanks very much, it works.

timedesain, your link can’t be opened

you have to change DOMAIN with yours.
??