Inside line

The inside line is the racing lineThe racing line is the line a racing driver follows to take corners in the fastest possible way. By using the... There's more... taken by one of two drivers competing for a cornerIn formula 1, a corner is much more than a turn on the track, it is a considered and deliberate... There's more... and refers to the line between the apexApex refers to the point of the corner where the car comes closest to the inside of the track and... There's more... and the other driverOK, so we all know what the driver is, right. I've always liked the description that F1 drivers are like... There's more.... 

When drivers compete for a corner, the driver in front (sometimes by millimetres) has the right to the corner, and the challenging driver must give way. The defending driver can only move once to block going into the corner and not at all under braking. 

This is where the challenging driver may see an opportunity and going in deepGoing in deep refers to a driver braking late in the corner so they have carried more speed and gone... There's more... to take the inside line can ab a good option. 

Read about racing lines in this article by f1metrics – here