Please help me out, What are the key things that needs to be in a good performing website.
Read more about SEO friendly (Most of the time SEO-friendly and user-friendly are related)
Avoid: Dumping large amounts of text on varying topics onto a page without paragraph, subheading, or layout separation.
Related to users & Search engines.
Google official - Search Engine Optimization (SEO) Starter Guide
Google official // pdf
Making your website user-friendly is extremely important to make your customers coming back to your website.
you need to make your website easy to navigate is one of the most important factors that have to take into account.
Creating a drop-down menu makes it easy for customers to go directly to what they want.
if you carry multiple products in different categories, break them into small so customers can be easier to find.