Why is GMB important?
From Rand Fishkin one of the key leaders in SEO in a presentation:
1.46% of all Google searches have local intent [source: HubSpot] that’s 1.6 billion seaches per day where people are looking for products, services and information in their location.
2.93% of all local searches now feature GMB [Source: STAT Analytics] So virtually all of those searches feature GMB.
3.68% of people contact a business directly from search results [Source: Search Engine Land]
If they are on a mobile device – which 50% of all web traffic is – all they have to do is tap a link.
88% of people trust online reviews as much as personal recommendations. [Sources: Forbes]
Getting GMB and getting your business registered/cited on local directories aka citiations.