Being a scientist is an excellent job, and science does not include research, calculation, doing experiences and get numbers and results, being a scientist is a way to see and to interpret the world, it’s a style of life and of thinking.
In order to show the value of what a scientist is doing, he should communicate his work to other he should show to the world a part of his everyday life.
So science is also about communication.
Generally, this communication is delivered to a variety of audience most of them are a non specialist in scientific field so in order to do that, the scientist must give talks, write papers and communicate with audience through every possible way from the peer reviewed article to any public tweet or any other social media. in order to educate people and inform them about his finding.
Publishing science and communicate it, enable the scientist to clarify, and illuminate the public point of view, it helps to spread culture, to fight ignorance, to increase public understanding of science, when the public enjoysscience, it’s suggested there would presumably be more funding, progressive regulation, and trained scientists. I can mention the example of COSMOS television show that has influenced a whole generation so a lot of those who watched the TV show decided to become a scientist.
the more the culture of science is spread, the more we could get scientist and engineer around and that will make nations grow economically,
Also, it can explain the fee and the costs needed to the scientific research, when people know the importance of it they feel like their money with it. It can also help to find more financial resources to the research.
spreading health science, culture for example makes people to benefit of better health condition and healthy environment to live in. it can bring hope to sick people,because a patient of cancer should always be interested in the latest finding of researchers and if they have find a remedy to his condition
We actually live in a world of technology and to communicate science make it more understandable and controllable by the public
Propagation of science enables the reduction in the spread of myths, false information and non secular explanations of the world.
it has also an imaginative way by opening a window on science fiction, that make people more creative.
It also makes people feel more empathy with each other and with the other species. it can even affect our ethical point of view to the world example doing experiments on animal or even to humans.
It affects also the happiness of people if they understand how their brain and psychology works.
A new field of science like personal development, science affects directly the well being of people so it should be widely communicated
It affects also by a direct way the consumption behavior, when neuroscience is used in marketing
Governments also can might also benefit from more scientific literacy, since an informed electorate promotes a more democratic society. 
However, with all those arguments to communicate science, we should consider that scientist is human too, and mistakes could happen, They should be sure of the information while communicating them to the public and relativise them.
An effective communication must be considered too, so we could be sure that the information was clearly understandable and to avoid misunderstanding of the information. but that doesn’t mean that we underestimate the importance of science communication, which have a very important effect on the everyday life of people, like it was discusses above.
Science communication is able to decrease the gap between science and social
1-[ As summarised in Gregory, Jane & Steve Miller (1998) Science in Public: communication, culture and credibility (New York: Plenum), 11