Absolutely no one will tell you because in principle it is impossible. However, I will provide you with a way by which you can avoid SEO advertising and other things.
Use fictitious data
Use VPN
To work, use the TOR browser
In principle, these three actions are enough to keep your data safe.
If you are the owner of the site industry email list and are worried about its security, then you should resort to the help of a white hacker.
A white hacker is the opposite of an ordinary hacker. This person is a cybersecurity specialist and provides his services to companies that need it. Naturally, the services of this specialist are not cheap, but he will conduct controlled attacks on your site and help identify vulnerabilities. With the help of these attacks, you can find out which holes should be patched in your system so that it is safe.
Contacting this specialist is mandatory (if you are not one yourself) in order not to get hurt. For example, you are the system administrator of an online store and your store is subject to a Ddos attack. A white hacker will not only be able to contain this attack, but even redirect its power back to the attacker and thus your site will be 99% secure.