If you type an IP into the browser, it will default to HTTP on port 80. You can override this by either specifying the protocol (http://IP or https://IP) or you can put :PORT appended to the IP (so like 10.10.10.10:8080). So for instance if you have an SSL (HTTPS) enabled web server running on host 10.10.10.10 port 8081, you would use https://10.10.10.10:8081
Also, most web servers (Apache, Nginx, IIS, etc) allow for what’s known as virtual hosts, where they may or may not respond to the actual IP, but rather you would need to use the DNS hostname such as www.sample.htb. This is because the same server can be hosting multiple sites virtually, so www.sample.htb and secret.sample.htb are separate sites, but on the same machine; if you just go to the IP, it will not know which one to give you.
Also, I don’t know if that IP is an actual target here or not, it was an example only.