Grammarly is hit or miss.
It's great when it comes to getting a holistic view of the overall quality of the content.
But you can't rely totally on its quality score.
I process a lot of writers for my content creation agency and let me tell you.
A lot of them produce content that Grammarly would rate as 98 or higher, but the quality simply isn't there.
It's not engaging, it doesn't really deliver on the intent behind the content, or it suffers from structural issues.
You have to understand that writing is not just about grammar.
Grammar is technical.
You can get that with ChatGPT or some other AI tool.
Instead, writing is all about making a human connection and ultimately persuading that human being to conclude that you are authoritative.
Remember, nobody is going to buy from you or do whatever it is that puts extra money in your pocket if they don't first trust you.
The key here is to create content that engages the reader to the point that they are willing to trust you.
This is where relying on a wholesale basis on automated tools falls short.