Está is the conjugation in present simple of the verb "estar" which is similar to the verb to be. Estar is in many ways the same as ser (another verb to be) but its uses vary depending on the message. Estar/ser are the usually the most difficult verbs for English speaking students to understand and use correctly. I recommend you to pay a lot of attention to them.

Está is the conjugation in present simple of the verb "estar" which is similar to the verb to be. El, la, los and las are like THE in English. Just like Paula has just told you estar can be used in many ways, it is the same as ser (another verb to be) but its uses vary depending on the message. Take a look here: http://www.spanishdict.com/answers/100040/ser-vs.-estar#.VdzAY_aqqko

Spanish "Está". English" Is "