How long does fresh lemon juice last?

I'm curious to know, how long can fresh lemon juice retain its freshness and taste? Is there a specific timeframe that I should be aware of when storing it, whether it's in the fridge or at room temperature? Are there any telltale signs that indicate when the juice has gone bad? Additionally, are there any tips or tricks that I can use to extend its shelf life? Understanding these aspects will certainly help me make the most of my fresh lemon juice.