Control statements in C are programming constructs that allow programmers to control the flow of execution of their programs. They are used to specify the order of execution of the instructions present in a program and make it possible for the program to make certain decisions, perform various tasks repeatedly, or even jump from any one section of the code to a different section. There are three types of control statements in C: selection statements, iteration statements, and jump statements.

The primary types of control statements in C are decision-making control statements, which include simple if statements, if-else statements, nested if-else statements, and else-if ladder. In conditional control, the execution of statements depends upon the condition-test. If the condition evaluates to true, then a set of statements is executed, otherwise, another set of statements is followed. Decision control structure in C can be implemented by using if statement, if-else statement, nested if statement, and if-else-if ladder.

Control statements are essential for writing efficient and readable C programs. By managing the flow of execution based on particular conditions, they enable a programmer to design more efficient and understandable code.