So Tabatha,
Wifi connection is not the same as internet access. A wifi connection, means you have a connection between your pixel book and your hotspot. Now a strong connection is good and it means less issues with data transfer between the two. [br]
If there is issue between your hotspot and it’s network connection to the internet, then your pixel book will see that issue as well. In most cases, it means that there is user interaction needed to further “internet connectivity” beyond the hotspot.
It’s possible you need to enter a username and password in a specific webpage usually called a “captive portal”. You see this all the time at a hotel or an airport. They ask for basic info before they give you complete internet access. Usually this automatically happens when you connect to your hotspot, and then try to surf the net. The hotspot will jump in and say inject its own webpage asking for login credentials.
If this is something new that has occurred to you, I suggest you call your provider confirm if anything has changed (they may have updated the device remotely or changed their mode of operation). If you experience this issue with ALL wifi networks you know and trust, then there maybe a deeper issue involved.