Even if the site name is entered correctly in the browser, attackers can spoof it in whole or in part (for example, by intercepting traffic in public networks - subways, cafes or business centers). Thus fraudsters can gain access to customer data, place their banners or payment forms on your site.
SSL certificates exclude the possibility of such spoofing - by checking the certificate, the user can be sure that the domain is hosting the exact site that should be there, not a duplicate.
In addition, the https certificate allows the user to verify who the owner of the site is. This means that the user can verify that he/she is visiting the site of the desired organization and not the site of its duplicate.
Another important function of SSL certificates is encryption of your Internet connection. An encrypted connection is necessary to prevent possible theft of sensitive data during transmission on the Web.