Having a certain post you want to make as the top post on your blog with newer post falling after it. However, several sponsored post will certainly want their brand remain on the top of a site for some period
depending on the agreement. Here are the few steps in achieving this in blogger
(1) Log in to your dash board and click on post
(2) Place the cursor on the post you which to make the top post and click on edit
(3) On the right side of the page click on Published on
(4) From there you can choose a date you want the post to last as the top post.