A: Hey macbay! A Commercial license might be enough for you, you probably don’t need Agency (unless more than 3 people in your company will be using the icons).

It’s allowed to use the icons for web design, as long as the product you provide to your clients is the end product (not a template they can edit, or similar).

You can read the full license terms here (under Commercial) -> https://flat-icons.com/license/

Hope this helps, let me know if you have more questions!