It was in my first year of University when we were used to running our newly built websites on large screens like laptops, desktop PCs and we then had to accomodate devices with smaller screens like smartphones and tablets. we specified in the Code for the website to scale down the elements of the website and allow a concise image across different sized devices users will potentially use.

You can start by conducting a user research to understand your audience's needs or what they expect your product to be, Keeping a website simple will help new users to not feel overwhelmed while trying to familiarize themselves with the website. Make sure Text or any other passage is visible this includes the colors, fonts you as a web-designer choose to use. Inspire Security of the users when using the website by having valid SSL encryption and displaying them on the website; HTTPS is also highly recommended over unsecure HTTP. Last but not least implement feedback you get from user research and iterate new versions of the website to finally reach satisfactory level design of the website.