What is the use of type_option.strobe=0/1 inside the coverage group

SystemVerilog
1 
class test;
  bit a;
  rand bit [3:0]addr;
  
  covergroup cg @ (a);
    type_option.strobe=1;//with or without this line the output is same ..so
    coverpoint addr;     //what is the significance of type_option.strobe=1
  endgroup:cg
  
  function new();
    cg=new;
  endfunction:new
endclass

module sample;
  test t1;
  bit clk;
  always #10 clk = ~ clk;
  
  initial begin
    t1 = new();
    t1.a=1'b1;#5
    t1.a=1'b0;#5
    t1.a=1'b1;#5
    t1.a=1'b0;#5
    t1.a=1'b1;#5
    t1.a=1'b0;#5
    t1.a=1'b1;#5
    t1.a=1'b0;#5;
  end
  initial begin
    repeat(15)
      begin
        t1.randomize();
        $display(t1.addr);
        $display($time," COVERAGE: %f%%",t1.cg.get_coverage());
        #5;
      end
   end
  initial begin
    $dumpfile("dump.vcd");$dumpvars( );
    #200 $finish;
  end
endmodule

output:
1
0 COVERAGE: 0.000000%
0
5 COVERAGE: 6.250000%
7
10 COVERAGE: 12.500000%
2
15 COVERAGE: 18.750000%
12
20 COVERAGE: 25.000000%
14
25 COVERAGE: 31.250000%
11
30 COVERAGE: 37.500000%
9
35 COVERAGE: 43.750000%
10
40 COVERAGE: 50.000000%
5
45 COVERAGE: 50.000000%
9
50 COVERAGE: 50.000000%
13
55 COVERAGE: 50.000000%
0
60 COVERAGE: 50.000000%
4
65 COVERAGE: 50.000000%
12
70 COVERAGE: 50.000000%

2

In reply to Prabeen Kumar:
It makes no difference in your example since you are only trggering a once per time step.

Optionally, the strobe option (see 19.7.1) can be used to modify the sampling behavior. When the strobe option is not set (the default), a coverage point is sampled the instant the clocking event takes place, as if the process triggering the event were to call the built-in sample() method. If the clocking event occurs multiple times in a time step, the coverage point will also be sampled multiple times. The strobe option can be used to specify that coverage points are sampled in the Postponed region, thereby filtering multiple clocking events so that only one sample per time slot is taken. The strobe option only applies to the scheduling of samples triggered by a clocking event. It shall have no effect on procedural calls to the built-in sample() method.