A "Connected App" is an application that can connect to salesforce.com over Identity and Data APIs. Connected Apps use the standard OAuth 2.0 protocol to authenticate, provide Single Sign-On, and acquire access tokens for use with Salesforce APIs.
In addition to the standard OAuth capabilities supported by the existing Remote Apps feature (which Connected Apps is designed to replace), Connected Apps add additional levels of control, allowing administrators explicit control over who can use the application, and various security policies to be enforced by the application.
May I suggest you please follow the below trailhead module which has step by step explanation.
A "Connected App" is an application that can connect to salesforce.com over Identity and Data APIs. Connected Apps use the standard OAuth 2.0 protocol to authenticate, provide Single Sign-On, and acquire access tokens for use with Salesforce APIs.
In addition to the standard OAuth capabilities supported by the existing Remote Apps feature (which Connected Apps is designed to replace), Connected Apps add additional levels of control, allowing administrators explicit control over who can use the application, and various security policies to be enforced by the application.
May I suggest you please follow the below trailhead module which has step by step explanation.
- https://trailhead.salesforce.com/en/projects/workshop-electric-imp/steps/connected-app-setup
Hope this helps.Kindly mark this as solved if the reply was helpful.
Thanks,
Nagendra