How do we separate these statements: assign and move? | SAP ABAP

Assign: at data object assigning, the data project’s technical attributes are verified by the system for compatibility with every type specifications of the field symbol (ASSIGN TO). General attributes can be taken by the field symbol if they are not found in the field type specifications. If we go with the assignment it shows in the memory.
Move: the MOVE statement is used for giving data object values to variables. It can be found as text symbol, literal, constant but it is not necessary to be found as a variable. No matter what the personal configurations the user has the decimal points always have to be stated with a period (,).