From this article, you'll get to know:
What is a Keyword Difficulty, and how do we calculate it?
Surfer calculates keyword difficulty based on domains strength ranking in the top 10. The metric helps to understand if high-authority domains dominate a keyword. Authority relies solely on referring domains.
Keyword Difficulty is available in Content Planner and is calculated for the whole cluster and specific terms within. Difficulty works on a scale from 1 to 10, where ten is hard to rank, and one means easy.
You can deselect keywords, and it will affect overall cluster difficulty.
What is Relative Keyword Difficulty?
Relative Keyword Difficulty is a metric that helps you understand if it will be hard to rank for a specific cluster on your domain.
Relative keyword difficulty considers your domain's strength and checks whether the difficulty is Easy, Medium, or Hard.
You can turn it on by connecting Content Planner to the Google Search Console:
1. Click on the "G" icon on the right side of your Planner.
2. Sign in to Google Account and give Surfer all permissions.
3. Connect your domain to the planner.
You also can sort all the clusters by difficulty:
I have connected my console to Content Planner, yet I cannot see the relative difficulty. Why is that?
It seems your domain is fresh, so instead of relative difficulty, we display a standard 1 to 10 scale.
When a domain is either new or has low authority, every keyword will be relatively hard, especially in tough niches. That is why we believe there is more value in displaying standard difficulty to differentiate hard from hardest.
Can you sign to more than one Google Account at the same time?
Yes, you can! All you need to do is go to the Google Search Integration page found in the menu and sign in there.