Common uses of the verb ser 

Identify someone

SER + name
- Soy Núria.
- I am Núria.

Nationality or origin

SER + nationality/ origin
- Soy de Barcelona.
- I am from Barcelona.

Profession or activity

SER + profession/activity
- Soy profesora.
- I am a teacher. 

Describing  someone or something
SER + adjective 
- Soy creativa. 
- I am creative.