While incognito mode shields your activity from the next person on your device, it does not shield you from many external observers. Two common observers are Wi-Fi owners and internet service providers (ISPs). As detailed in NordPass, these observers, whether you are in incognito or not, can view the domains you visit, the exact time and duration you are on them, the amount of data used, and your IP address. Luckily, there are limitations: While these observers can view the domains and search engines you visit, they cannot see your actual activity on websites, your login credentials, or what you type in search engines.
Let’s say I need to log into my bank account to download some documents. These observers would see that I visited my bank’s website at a specific time, how long I was there, and just how much data I downloaded. However, they wouldn’t be able to see my login information, the files I downloaded, or any of the information on my screen while I was in my account.
Websites themselves can view your browsing habits. This is especially true for any websites owned by a big corporation. In short, any website that uses the services of Google, for example, can share your browsing activity with Google. Schools and workplaces can also monitor your activity when you’re using their devices, so it’s best to focus on work when using a laptop issued by a school or employer.
CNET writer Nelson Aguilar clarifies the limits of incognito, explaining that “Private browsing is less useful when your goal is to conceal your online activity from a website, your internet provider or an organization managing your network. It is a local privacy tool, not a tool to mask everything you’re doing online.”