thanks for explaination.
actually i dont have any products added yet. you mean once i add products in my store and put them in featured products category then 3by 3 will work.do you know how to rename “featured Product” heading of the section and change its place in to the centre . if you see fujisports.com
there are so many sections with different categories.
my website https://37e364.myshopify.com/ . i want when i add section "featured collection " as you can see on my homepage it is “Men” it should be in centre , for any collection i add ,its heading should be in centre. same like fuji sports