So what exactly are the 3 “tiers” of traffic?
Tier 1 is “premium” traffic from these 5 English-speaking countries where you’ll typically get the most opt-ins and conversions:
United States
Canada
United Kingdom
Australia
New Zealand
More often than not, this is the traffic you’ll want.
Your conversion rates will simply be the highest with users from these countries (unless you’re promoting a country-specific or other unique offer).
Tier 2 consists of 43 countries where the majority of the remaining “good” traffic comes from:

Argentina Aruba Austria Bahamas Barbados Belarus Belgium Belize Bermuda Brazil British Virgin Islands Costa Rica Czech Republic Denmark Finland France Germany Greece Guam Hong Kong Hungary Ireland |  | Israel Italy Japan Mexico Netherlands Norway Panama Philippines Poland Portugal Puerto Rico Romania Russian Federation Serbia Singapore Spain Sweden Switzerland Taiwan Thailand U.S. Virgin Islands

Tier 3 consists of all the other countries where few leads or conversions ever come from …
… countries like Pakistan, Vietnam, Nigeria …
… and unless you’re an expert at monetizing this type of traffic you’ll generally want to avoid Tier 3 traffic because it’s essentially worthless to the average online marketer.
Tip: If you want to direct clicks from specific countries to different offers, you can use ClickMagick’s Geotargeting feature. This feature is fully explained here:

|  | How do the Geotargeting and Backup URLs work?