The following chart showed how a factor, that fit into one of two categories (primarily yes and no), correlated to Google pack performance. For example, a Google My Business profile either had the keyword in the business name, (yes), or it didn’t (no).
Again, just like with the ordinal variables, basic SEO b locking and tackling is still necessary. Just having reviews, making sure you are optimizing you profile etc are all features of business ranking high in local packs. More continued correlation with organic rankings driving GMB rankings should be more than enough to convince anyone to invest in their web presence. One of the main things that has changed as keyword in business name no longer correlates highly to pack rankings. Whether this is because the GMB product and support team have fixed the issue (color me skeptical) or because everyone is spamming their business name to keep up with the Joneses, well, I will let you decide 🙂
Also, as you would expect with a Google product, engagement metrics correlate very highly to positive rankings. If your profile lacks a strong cover photo it would reason that, all things being equal, you would get less clicks.