What does website security have to do with branding? It is pretty simple really. You have a website to show off your brand, if it is hacked people are only going to find your content posted outside the website, and social media. The website will be missing. Since the website's function is to find buyers and give them a place to buy you stop earning if your website can't be found. It makes sense to have redundency. Yes it is possible if you learn how.
When I built my first website in 2000 there was no thought given to security. Actually until one of the websites I created was hacked in 2012, I never gave it much thought.
With website security you want to start your defence at the website host. Those with security already set in place most often won't let you make changes. With every one I have used where security was already in place there was no issue. I have never had a site hacked that had security already in place.
Make sure the passwords you use for your domain name host, and hosting company are hard to crack. Always use passwords that are as complex as possible, and never use those passwords any place else. You really don't want to make it simple for a hacker to gain access to your website. Also be careful about the plugins you add. Many of them will let a hacker in as well.
There are many hosts though who give you control of security. This can be a good thing. The same part of the host that controls security is also where you can make changes, which speed up the website. Just make sure you add security features. In today's world most of the security is handled through wordpress. Make sure you choose the security addon that is right for you.
If you want to know more about website security, information is available through an internet search.