C'est la robe

Question

In one of the examples, the phrase is C'est la robe que je porte au travail. Yet C'est is supposed to be used for general, unspecified statemements. The dress I wear to work seems very SPECIFIC, it is not a dress she wears to school, or to go shopping. What am I missing or not understanding?

Maarten Kamp · Accepted Answer

Saundra, 
you are referencing the use of " c'est " in a general context as described under heading 2 in the lesson. 
Worth having a look at heading 1 ( this is what you are " missing " ). 
       1. c'est  in sentences it/he/she is + a/the/my... + [noun/name]
" If it/he/she is is followed by un/une/le/la... (any form of article / determinant) - it is a beautiful dress / she is a nice person - then you will use c'est. "
 
 Essentially, although there are infrequent exceptions, it will almost always be ' c'est (determiner) noun ', and not ' il/elle est (determiner) noun '. 
The usage in the sentence quoted obeys this structure. 
The link below may help further also. 
https://www.lawlessfrench.com/grammar/cest-vs-il-est/