How do you test if people understand your new product instantly

Hi everyone,
I have been building a simple link in bio tool on the side, and I cannot tell if new visitors understand the idea clearly enough.
As the builder, it always feels obvious to me, which usually means it is not obvious at all.
I want to learn from people who have done this before.
My questions are simple:
• How do you test first impressions?
• What signals show that the idea is clear
• Do you run quick user tests or something else
• What mistakes should I avoid early on
For context, the tool I am working on is boringone.page. It creates a clean one page profile from your links in a few minutes.
The focus of this thread is the process, not the tool.
I would love to hear how you approach clarity and simplicity in your own products.
Happy to share feedback with others, too.

Replies
If anyone wants me to check your product for clarity, I can look at it too.
I am already in this mindset and happy to help.