Website development brief

Everything that can be important for creating a good website
For example, register an audience for an event
On a 10-point scale, where 1 is a simple site, 10 is a festival-level site
1
10
For example, for a user to buy a product
What blocks are planned to be used
What animation to use
Is it necessary to fill the site with a contractor?
Do you need support after the launch of the site?