What do you mean by sea breeze and land breeze?

In areas near the sea (as in Mumbai) during the day, the ground heats up more quickly than water of sea because water has a higher specific heat and mixing currents disperse the absorbed heat throughout the great volume of sea water. The air in contact with the warm ground is heated. The warm air expands, becomes less dense and moves upward. To take its place colder air from sea moves towards the landmass. Hence, a convection current is set up which is called the “sea breeze”. It transfers heat away from the land and temperature remains moderate.