What is The Meaning of Olympic symbols ( 5 Ring )

As can be read in the Olympic Charter, the Olympic symbol represents the union of the five continents and the meeting of athletes from throughout the world at the Olympic Games. However, no continent is represented by any specific ring. Prior to 1951, the official handbook stated that each colour corresponded to a particular continent:

 blue for Europe, 
yellow for Asia,
 black for Africa, 
green for Australia 
and red for North and South America
The current or Modern meaning/view of the International Olympic Committee is that the symbol "reinforces the idea" that the Olympic Movement is international and welcomes all countries of the world to join.

Revival of the Olympic movement in modern history may be credited to French Freemason Baron Pierre de Coubertin. De Coubertin was inspired by Dr William Penny Brookes who had organized a national Olympic Games at Crystal Palace in the United Kingdom, in 1866, who had also adopted ideas from the Evangelis Zappas revival of the Olympic Games in Greece. The statue of Baron Pierre de Coubertin at Atlanta’s Centenial Olympic Park features the Occultic step pyramid, surrounded by the Two Towers or pillars with the Olympic rings flocked by doves above.