Short answer
A good web designer shows examples of work, gives a written quote with price and timeline before starting, explains what is included (domain, hosting, SEO, maintenance) and stays available after launch. Red flags are a price with no scope, a vague timeline and handing over a site without access.
What to look for in a web designer
Examples of previous work. Clear communication and a timeline. Transparent pricing with no hidden costs. Knowledge of SEO basics. The option of maintenance after launch. See the work.
Red flags
No examples or references. A price too good to be true. Unable to explain the process. No written agreement. Handing over a site without access or a way to make changes. Always ask for a written quote.
Why one person often works better
When the same person designs, writes the code and talks to you, less information is lost and nobody passes the responsibility around. That is how modernizuj.me works: one contact from start to launch. See the pricing.