Salesforce Access Token
Generate a session ID and access linkoAuth is an authentication flow that allows you to generate a Salesforce session (access token, aka session id). Salesforce is showing a login screen during this flow, where you will be authenticated with your own credentials.
In the end, you can reuse this session as a link to grant a temporary access to Salesforce with your own identity, without compromising your password.
The access is valid as long as the session is not expired or revoked.
Scope is enforced to web only (no api access). The process is secure as the token is not transmitted to the server, only processed in the browser.