I haven't tracked XP for a long, long time as a DM and instead level up when it makes sense for the story and the group. Some groups level quickly, others dawdle at various levels because they're having fun with the types of challenges they are facing that are level appropriate.
What XP and leveling mean for your group is going to vary by group and DM. Some groups get plenty of sense of accomplishment by finally proving that the sheriff really was corrupt and skimming off the top of the tax collection while shaking people down for other goods and services. It doesn't matter if they were 2nd level while they were doing it - their level is secondary to the accomplishment.
Others like that feeling of growth by gaining a few extra HP, abilities or spells and there's nothing wrong with that.
Personally, I like to organize my campaigns into "chapters", groups of encounters and challenges usually broken apart by a period of time during which people level up. While I don't have a hard and fast rule, the breaks between chapters can be months or even years. To me it feels more natural that the PCs spend downtime in practice and learning instead of the wizard just figuring out how to cast fireball because the group just took out that group of ogres.
What XP and leveling mean for your group is going to vary by group and DM. Some groups get plenty of sense of accomplishment by finally proving that the sheriff really was corrupt and skimming off the top of the tax collection while shaking people down for other goods and services. It doesn't matter if they were 2nd level while they were doing it - their level is secondary to the accomplishment.
Others like that feeling of growth by gaining a few extra HP, abilities or spells and there's nothing wrong with that.
Personally, I like to organize my campaigns into "chapters", groups of encounters and challenges usually broken apart by a period of time during which people level up. While I don't have a hard and fast rule, the breaks between chapters can be months or even years. To me it feels more natural that the PCs spend downtime in practice and learning instead of the wizard just figuring out how to cast fireball because the group just took out that group of ogres.