Enum that represents the possible challenge frequency and
difficulty configurations for a web key.
Values:
CHALLENGE_SECURITY_PREFERENCE_UNSPECIFIED (0):
Default type that indicates this enum hasn't
been specified.
USABILITY (1):
Key tends to show fewer and easier
challenges.
BALANCE (2):
Key tends to show balanced (in amount and
difficulty) challenges.
SECURITY (3):
Key tends to show more and harder challenges.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[],[]]