What do the three dots on the Dominoes Pizza logo represent?

"The red domino piece in the Dominos Pizza Logo consists of a block containing one dot, and another containing two. The three white dots have a special significance regarding the organization itself. Each dot is supposed to signify one of the three shops that were initially set up by Dominos. The initial plan was the inclusion of an additional dot to represent each store that was established in the future. As expected, the extent to which this organization grew did not make it feasible."

The very first Dominos logo, which was created in the 1960’s, was created for two reasons. First it sought to attract more customers due to the bright and cheerful colors of the logo. The red, white and blue colors were meant to be highly noticeable so as to appeal to the largest amount of people possible. The three dots on the logo symbolize the three original Dominos locations that were open at the time. As the company planned to work hard on franchises, they planned to add a dot each time that a new location opened. Of course, with the incredible success of the Dominos brand, this plan was scrapped because the logo would otherwise need thousands of dots.

https://www.logaster.com/blog/dominos-logo/

A complete domino's history is here:
https://en.m.wikipedia.org/wiki/Domino's_Pizza#History