This is a guest post by Liuda Nebozhak from Crello.

Every start-up undergoes some trial and error in its first 1-2 years. Those are probably some of the most difficult and crucial learnings of any new business. 

There's a ton start-ups need to figure out, including their own PR and marketing. PR especially plays a key role because as a start-up nobody knows you and you need to get the word out about your existence, your products and the new value that you add in the market. 

Our company Crello - which offers a design tool specifically for marketers and bloggers - has gone through multiple trials and errors but we've learned a lot.

We recently announced and celebrated reaching the major milestone of 1 million users over the course of just 20 months.  However, it took us some time to find our product-market fit and we are continuing to tweak it to this day. Along the way, we are leveraging our product development with the help of PR, brand ambassadors, and market research, amongst others.

Below are my 5 key takeaways for getting your start-up off the ground.