Despite similarities, mortar and concrete are not the same. They are both widely used building materials, and are made of similar ingredients (cement, aggregate and water), but they are not interchangeable and have very different properties.
Mortar is usually made from sand aggregates, and is used to hold building materials together, such a in bricklaying, which is why it uses much more cement than concrete and has a much thicker consistency.
Concrete is a more structural material, usually composed of stone or gravel that gives it more strength and durability. This means it lasts longer and supports the structural integrity of buildings and foundations.