Steps:

Navigate to Groups: Login to Azure Portal and navigate to Azure Active Directory > Groups.

Locate your target group: Search for the group you want to add members to using the search bar or browse through the list.

Access Members: Click on the desired group to open its details page. Select the Members tab.

Add Members: Click the Add members button.

Choose Users or Groups: You can add both individual users and entire groups as members.

Select Members: Start typing the names or email addresses of users or group names in the search bar. Choose the desired users or groups from the suggested list.