You can delete the m1 by clicking on the "Delete M1" button in the left column of your blog. Blogger is a free blogging service. The "m1" you're referring to is most likely an ad that has been placed on your blog by Google Adsense. To remove the ad, click the "Ads" tab in your Blogger dashboard, then click the "X" next to the Adsense ad you want to remove. To get rid of "m1" on Blogger, you can either delete the m1 code or replace it with another tag. To delete the m1 code, click on the text box where your post content goes and press CTRL+A to select all. Then, click anywhere inside the text box and press DELETE.