The phrase "certain level" means a specific point or degree that has been identified or specified. It refers to a particular amount, extent, or quality that is defined or known. Full definition
Third, (and least likely), she needs a guarantee of certain levels of promotion in that contract. (kriswrites.com)
Other features include an award system including awards for reaching certain levels in the career mode and dropping off a number of passengers. (gamergeddon.com)
Options trade at certain levels of implied volatility because of current market activity. (ally.com)