Is Google Watching You?
Just because you are using Incognito mode for searching things you don't want others to see doesn't mean that you are actually private. Yes, you read it right. Incognito mode only grants a no-search history feature but not a private feature. I have seen posts that they use the mode for privacy. Well, let me tell you something. It is not private.
There are many apps and features from Google that currently watch your tracks and progress. From the videos you watch in YouTube up until your search history in Google search engine, you are being tracked. Even though, you stopped you're search history in YouTube and the search engine, the company still has access to you.
If you're wondering how, let me talk about Browsing history first. Websites such as Google as search engine you use to search anything you want are not as private as you think. When you want to clear your history of search, there is a certain button in the settings of Goggle for you to erase them. But still, Google knows what you have searched. How? The Google has servers that stores all your browsing history. You'll be able to delete the history but that doesn't stop Google in knowing them. The deleted ones are still with Google. Though, it stops ads and other kinds of stuff for your results.
Can WiFi see your history?
Absolutely YES. WiFi have logs and servers that stores the history of your browser. Sometimes WiFi admins can use packet sniffer to gain possession of your private data.
It is reported that after 18 months, the deleted data will slightly remove the information or data associated with you.
Videos you watch on YouTube are also not private as you think they are. The video app may have the feature of pausing your search and watch history, the Google company still knows them. Google maintains records of how you use your browser related to the deleted data. It may not exactly know what you searched in the app, but it us recorded that you searched about something on a specific date and time. The WiFi actually can see the link to the YouTube video but it does not generally keep track of what you search.
How about with your Emails on Google, are they also tracked?
Actually they are not read by Gmail developers and staff. But you may notice some ads on the app or browser that is related to the emails you receive. The company uses a detector or scanning machine to scan emails to send relevant ads to you. Gmail, like any other apps out there, can be hacked. So if you want to know if your account is being used by someone other than those you granted access to, look for the "Last Account Activity" that will show you a table with the mobile used alongside the browser and POP3.
If you want to have privacy in everything, you can use Vpns or proxy chains. There are apps online that offer free vpns for you to use.
There's no total privacy on an open IP even with incognito.