Here is a quick walk-through of what you need to know about the various fields and what they mean for your profile's exposure inside Partnerhub.
What you need to know about the various fields:
CTA headline: Copy the header text from your website's home page. This ensures you have marketing's sign-off and that it is short.
Describe your product: I suggest copying this off of the about section of your LinkedIn company page.
What's your primary category? Two or three words tops. Use your primary keyword like "Chat Bot for eCommerce". If you aren't sure what this is - try searching Google for your company name and see what the headline says in the search results for your company site.
What is your primary / best target vertical? This question will match you with agencies, but you can only choose 1, so choose the best vertical. Only choose "Agencies" if your solution only sells to agencies.
Which of these agency types are best for your partner program? Again, you are going to want to select everything with the intention of creating a wider net for your partnership, but admin will deny your application if you put too much here.
Choose the primary service your solution makes easier/better? Select one that you know agencies are using your solution to improve for themselves or your clients. If this is too big a challenge, open support in a new tab and chat with an agent: https://help.partnerhub.app/
Clients / users size: The same rules apply - even though technically enterprise companies can use any product, SMB-focused products don't sell to enterprise companies. So choose what fits so admin doesn't have to deny your application.
What region does this partnerships POC cover? This is for products only accepting partners in specific countries.
What is your offer to agency partners? Talk to the agency about what you do now for them that's above/beyond what you do for customers. And mention what's coming.