Heat and temperature are often misleading in thermodynamics. So what is heat and what is temperature?? To explain this I will start by telling you what they are not. Heat is not energy and neither is temperature! Temperature doesn't tell you anything about the internal energy of a system, rather it tells you the direction that heat will flow. So temperature is indicator of the direction of heat flow. Objects with a higher temperature will tend to give heat to an object with a lower temperature. For example and ice cube in a glass of water will obtain heat from the warmer water and inturn melt.
Now to approach heat. We know that a temperature difference drives an exchange, but what is exchanged. So far we have used heat as describing the what has been exchanged but don't yet know what heat is. Energy is what is being exchange! For example, in the glass of water example energy flows from the water to the ice cube and cause it to melt. Heat is then described as the transfer of energy. This definition of heat is very misleading heat is not actually energy, it rather describes energy being moved from one substance to another. Heat is energy in transit.