Maslow's Herarchy of needs is typically shown as a pyramid and is divided into layers. The most fundamental level of needs is at the bottom and it goes to Transcendence at the top. The bottom layer consists of four which is usually named the deficiency needs. Here are the definitions for each section:
Physiological - These are literally the requirements for human survival, for instance, air, water and food.
Safety - Safety is the next key needs which gives us security and comfort. Safety and Security is narrowed down into groups which include personal, financial, health and accidents.
Love and Belongingness - Safety is mostly overridden by the feeling of belongingness and love in your social life. Love and Belonging is shared everywhere but generally into three groups, Friendship, Family and Intimacy.
Esteem - Esteem gives the human desire to be accepted, respected and valued by others. Therefore when you receive this you gain self-esteem and self-respect.
The Need to Know and Understand - Cognitive needs (as it's also known as) is the expression that humans need to explore, discover and create to get a better understanding of the world around them.
Aesthetic - Humans need beauty or something new which is aesthetically pleasing to continue up the pyramid. Humans often do this by refreshing themselves in the presence of beauty in the world, such as nature.
Self-actualisation - It is the initiative of the human to make the most of their abilities and strive to the best that they can be. 'What a man can be,he must be' sums this category up.
Transcendence - To go above and beyond of the level of being. Transcendence in Latin means climbing or going beyond. This is sometimes referred to as Spiritual needs.