The truth is, your Wifi bill will only show you how much data you've used, and maybe some general information about the types of devices that are connected to your network. But, it won't reveal any juicy details about your online activities. So, you can breathe a sigh of relief if you're worried about your ISP judging you for your guilty pleasure websites.
However, it's worth noting that some ISPs might use deep packet inspection to monitor their customers' online activities. This means they can see what websites you're visiting, and even what you're searching for online. But, this is usually only done to optimize their network performance, not to spy on you (or so they claim!).
So, what can you do to keep your browsing history private? Well, for starters, you can use a Virtual Private Network (VPN) to encrypt your internet traffic. This will make it much harder for your ISP to see what you're up to online. You can also use incognito mode or private browsing to keep your search history under wraps.