Salesforce Lightning Experience comes with a slick user interface that is easy to navigate and even easier to use right from the beginning. Lightning is built entirely out of what Salesforce calls Lightning Components, which are miniature applications designed to help users accomplish tasks. Subsequently, it is quick and easy to create a custom lightning record page in Salesforce. A Lightning Record Page is a collection of several components within a single web page. By default, each object – Accounts, Contacts, Opportunities, etc. – has its own unique record page provided by Salesforce, consisting of several standard lightning components, also provided by Salesforce.
Check out this video to learn how to build a custom record page.