when I say sales model what I mean is the most successful/feasible way to sell your product.
is it via inside sales (people sending emails, making calls and giving online demos) or field sales ( people going door to door or flying to large enterprise customers for meetings etc) or a combination of both.
are you getting your leads via marketing (inbound) or do you have to do cold outreach (outbound) or a combination of both.
what tools and process do you use to sell what is the average time it takes you to close a deal what's the average deal size a sales person can close etc etc
all these factors and a bunch more would make up your sales model.
probably a good idea to write a post dedicated to this subject but I hope this clarifies it a bit :)