Human beings are naturally social creatures. And when you consider that we spend one-third of our lives at work, it's clear that good relationships with colleagues will make our jobs more enjoyable.
The more comfortable co-workers are around one other, the more confident they'll feel voicing opinions, brainstorming, and going along with new ideas, for example. This level of teamwork is essential to embrace change, create, and innovate. And when people see the successes of working together in this way, group morale and productivity soars.
Good work relationships also give you freedom. Instead of spending time and energy dealing with negative relationships, you can, instead, focus on opportunities – from winning new business to focusing on personal development.
And having a strong professional circle will also help you to develop your career, opening up opportunities that otherwise might pass you by.
Further reading
source: https://www.mindtools.com/pages/article/good-relationships.htm