Individual design for each individual website block. Combine design and text content to "hook" the customer's attention and cause a desire to order the service. Provide easy navigation.
Young and middle-aged people and older people who care about their health. Residents of big cities who are interested in improving water quality, which is consumed. Regardless of the money options, the person should see the benefits and order.
The use of parallax effect (fixed background during the scrolling).
Development and promotion!
Of course, if you want to add a site's popularity and bring in the top positions in the search...
...But that is another story!