How to redirect to a specific page after login?

To redirect users to a specific page after login, you can simply add the redirect URL parameter in login form Shortcode.

The redirect_url parameter allows you to redirect to a certain page after the user is logged in. E.g. [user_registration_my_account redirect_url=sample-page] will redirect to the sample page after logging in.
Note: Don’t forget to replace the “sample-page” with the slug of the page where you want to redirect.

add_filter( 'user_registration_login_redirect', 'ur_redirect_after_login', 10, 2 ); 
function ur_redirect_after_login( $redirect, $user ) { 
     return 'sample-page' ;
}  

Having trouble with adding custom codes to your site? Check this.