Designers don’t tell you because they don’t know and, business owners don’t realise that a website can be used in any one of two ways.
You may be a locally focused small business that only needs a place on the Internet where you can direct prospective clients to see what products or services you offer.
You sell locally, so many of your clients are people who you have met or know from your community channels on social media or organisations you belong to. You will then be more interested in a website as a showcase and less about search engine optimisation.
If you sell nationally or internationally, you will be much more dependent on search because your prospective clients don’t know you exist. They need to find you on the Internet via Google so they become aware of your existence, and the products or services you provide.
Decide where your market is, so you will know what type of website you need and how you will market it.