Hello,
On the homepage of my website there was blank spaces between the Ads showing like this http://prntscr.com/gn3i95
I had also marked the space with red question mark sign. Please help me how to fix so that All Ads should be in regular postion and order.

Waiting for your reply.

Your images has probably different sizes.
Go to ocadmin - settimgs - media, change setting for image aspect and regenerate thumbnails.