Your Timeline is not about the internet .. it is a useful item that is linked to GPS on your phone. It shows you exactly where you have physicaly been, as long as you had your phone with you.
To find it on your phone go to Google maps ..
In the top left of the screen you will find 3 bars.
Click on them ..
Second onedown is .. timeline... Click on that.
Look on the calendar and on any given day you can see where you were .. how far you travelled and what route you took and lots more.
If you are like me and cant remember yesterday, it can be quite a useful tool.
If you dont want it tracking you .. go to the top right of the screen where you will find 3 dots..
Click on them and you will see privacy and settings.
From here you can turn it off.
My guess is you will spend the afternoon looking at where you were weeks ago !