As startups, have you come across brick walls and frustrating hurdles when it comes to marketing your business and gaining customers and clients?

We are just in the earliest stages of our journey and we would like to know what areas in marketing you think is crucial for all startups to really hone in on. I know that "revenue solves all problems" (of course it doesn't but it solves most of the problems) and to do that, you have to ace your marketing strategy to help get sales more clients.

If you're in the stage where you're trying to grow or scale, what are your pain points and what would be nice to know or have in terms of marketing.

If you've passed the struggling stage, what advice can you give those of us who are just on the way up or stuck in the marketing and sales struggle loop?