Tiers are an alternate form of rankings that stresses the big picture rather than parsing the details. Alike players are bundled together at each position, thereby denoting the biggest drop-offs within the rankings. This way, you can control for position scarcity in the heat of the draft. The position nearing a drop-off is generally the one you'll want to target.
Below are the third base tiers for 2023, depicting a position that starts out strong before dropping off a cliff.
The Best: Jose Ramirez
The Elite: Rafael Devers, Manny Machado, Austin Riley, Bobby Witt^, Nolan Arenado
The Near-Elite: Alex Bregman†
The Next-Best Things: Gunnar Henderson, Max Muncy
The Fallback Options: Anthony Rendon, Eugenio Suarez, Matt Chapman
The Last Resorts: Jose Miranda, Brandon Drury, Josh Jung, Ke'Bryan Hayes, Justin Turner, Josh Rojas, Jon Berti^, Patrick Wisdom, Alec Bohm, Jordan Walker, Ryan McMahon, Yandy Diaz†
The Leftovers: DJ LeMahieu, Ha-Seong Kim, Luis Urias, Eduardo Escobar, Luis Rengifo, Josh Donaldson, Yoan Moncada, Brett Baty, Spencer Steer, Wilmer Flores, Ramon Urias, Brendan Donovan, Jeimer Candelario, Joey Wendle
^ one tier lower in points leagues
† one tier lower in categories leagues