Disable User Email Verificcation

The user activation feature helps reduce spam user registration in WordPress by default. If you select the email method, then the user must click on an activation link before they can login (see Creating a Custom Registration Form section in this article: https://www.wpbeginner.com/beginners-guide/how-to-allow-user-registration-on-your-wordpress-site/). If you select the manual method described in the article, then all users must be approved by an admin before they can login to your site.

I just want the user account activated as soon as he fill the signup form. Is this possible?

I’m not aware of a way for the user account to be activated as soon as they fill out the signup form. You could search to see if there is a Disable User Email Verification type of plugin: https://www.ads-software.com/plugins/search/Disable+User+Email+Verification/.