How does playing in a position in Texas Hold'em poker work?

Why do we fold certain handsranges if we're in a specific position, but they're considered stronger in different seats?

Adjusting Hand Selection Based on Position · Tightening Up in EP: In the early position, focus on premium hands and

position in poker In early position players have to decide whether to call, fold, or raise without having any idea about what cards other players have By the time the action

position in texas holdem Understanding Different Positions In Poker · Under the gun · Hijack · Cutoff · Button · Small blind