Give examples of strategic steps to develop the functionality of the site?

Question

Functional testing

What can they be? For anyone, it's not only - repaint this or that block in a different color, or move, swap blocks.

Answer 1

No matter how many times I read the question, I did not understand what the author was asking.
Let's answer in turn: what is the functionality of the site? Functionality in jargon means functionality, that is, a set of site functions, its capabilities. Ok, let's say we have an online store. What opportunities are there: you can buy goods. Functional development is an increase in the capabilities of the site, such as quick search, quick purchase or price comparison. As you can see, it all depends on what kind of site you are going to improve.
Strategic steps: look at what competitors have, focus on leading firms in the area.
And yes

it's not only - repaint this or that block in a different color, or move, swap blocks

Answer 2

Your question is at least not correct. Do you have a development plan for the project? There is no own representation as this or that block, the function should look and work?
Let's do it. You have a project - a site.
1. Define its purpose and objectives
2. Define the desired results for you
3. Write down the functions of the site and what they do
4. Make the desired changes in paragraph 3, what they should do and how they work, you can even use the example of competitors
5. Decide on redesign
Well, right now, I wrote it very rudely, as I understood the question, I gave such an answer. If not, sorry.