What is a "good" engagement rate?

On average, an engagement rate is said to be "good" from 2.5% in organic, and 3 or 3.5% for a contest (more information on our blog).

However, we would like to qualify this, as it all depends on the sector, the objectives of the campaign, the advertisers, the period, the influencers... For example, the smaller the community of an influencer, the higher the engagement rate.