Explain the term assembler directives.

An assembler directive is a statement to provide direction to the assembler to execute the task of assembly process. These assembler directives control organization of the program and give essential information to the assembler to understand assembly language programs to produce machine codes. It indicates how an operand or section of a program is to be processed through the assembler. An assembler assists directives to organize segments to control procedures, to define data and to define macros.