Hi @Ахан, Did you mean between <UL> and <OL> ?
You wrote <or> but, I think you meaned <ol>... If yes:
<UL> is Unordered list, and <OL> is Ordered List.
UL: bring its itens using little marks such as little circle or squares;
OL: bring its itens using numbers or letters, in ascending order;
I hope I helped.
Here is my shopping list:
It's an <ul> because order doesn't matter and I will buy all the items in whatever order I see them at the store.
Here's how to make coffee:
1. Pour water into machine
2. Add coffee beans to machine
3. Press the coffee button
It's an <ol> because if I press the button without water in the machine, nothing will come out, so order is important.