However, unlike the English "to be," "estar" is used to express temporary states, locations, or conditions. It's used to describe something that is happening at the moment or that is changeable.
Here are some examples:
* Estoy cansado. (I am tired - temporary state)
* Estamos en casa. (We are at home - location)
* El agua está caliente. (The water is hot - condition)
In contrast, the verb "ser" is used for permanent characteristics, identities, or origins.
It's important to note that "estar" is a very versatile verb with many nuances, and its meaning can change depending on the context. For example, it can also express:
* Location: "Estoy en el parque" (I am at the park)
* Emotions: "Estoy feliz" (I am happy)
* Health: "Estoy enfermo" (I am sick)
* Activities: "Estoy trabajando" (I am working)
If you want to learn more about the nuances of "estar," I recommend checking out some Spanish grammar resources or practicing with native speakers.