4. Ask for references from existing clients/employers. Do they certifications from Google? Have they been featured in magazines or have they given talks to seminars?

5. How long does your average client stay?

“You will make better decisions once you begin thinking long-term rather than short-term.”

-- Adam Smith

6. How much do you cost? 

How much value can you bring to the table? Always weigh costs vs value. Compare how much they cost vs the KPI’s in question no #2.

As Warren Buffet said: “Price is what you pay. Value is what you get.”

7. How will the communication be between the parties involved? Who will be communicating with the project?

"No one can whistle a symphony. It takes a whole orchestra to play it." – H.E. Luccock

8. What values do you uphold? Are you open to feedback?

“I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better. I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.” --Elon Musk

PRO-TIP:

Bidding and budget strategy should be based on your goals and KPIs stated on question no 2.