Relating to a particular part of the economy, rather than the whole economy.
The word 'sectoral' makes people think about different parts of the economy, like farming, or stores, or factories.
Examples:
The sectoral changes affected the farming part of the economy.
She studied the sectoral differences between stores and factories.
Sectoral problems can hurt the whole economy.
The sectoral changes made the factory workers happy.
The sectoral differences between the two countries were very big.
The sectoral changes were very important for the farmers.