A website without SEO does not rank higher in search engine results. Except for known traffic (visitors) to use it, it even fails to fulfill any purpose for being online.
A good SEO website ranks on the first page of Google, so if your website isn’t there, then it’s probably due to a lack of SEO strategies or poor-quality content.
A website without SEO increases business promotion, marketing, and advertising expenses, which lowers the possibility of business profitability.
Here's related information that you may find helpful - 17 Different Strategies To Drive And Increase Website Traffic
P.S:
You are currently on the Digital Marketing Forum page; for more information on various topics that may be helpful, please visit Blog Posts (button below) and share any content post you love with your network.
[If you have any specific questions in mind, please drop a mail and I will answer through a post at the earliest possible time]. Check this forum frequently for fresh posts.