First and foremost, it is important to always Test Keywords before attempting to rank them. This will provide insight into the success rate of ranking the keyword in question, before committing to the process. The test results at the time of testing will indicate the likelihood of the keyword ranking, should you choose to proceed with the ranking process.
Any keywords can be used to achieve a ranking in any Tier for a specific marketplace. However, it is crucial to take into account both your total Rank Juice and Rank Juice Daily Limit when making this decision. If an increase in daily limit usage is necessary, it is recommended to aim for a Tier 3 – Agency Plan as it offers the highest limit.