Well, to put it simply, a website is an entire online domain that usually includes dozens - or even hundreds - of separate pages and posts, whereas a landing page is just one specific page on that website.
The purpose of the landing page is also different than that of your website. Your website is where you host all of your brand’s content pages and posts. Your landing page, on the other hand, has one specific purpose: To get your customers to take a specific action when they first click through to your website.
Most landing pages are built to collect email addresses, so they usually feature copy designed to persuade your customers to give you their email address or social profiles. Once you have this data, you can keep sending marketing messages to them to push traffic to other pages on your website and drive sales
Also, websites are built using CMS like WordPress, whereas landing pages are usually built with specific landing pages software. You can find reviews and information about the different landing page software packages on BestLandingPages.Software.