Here's how it works. When you learn solfege, you are training your ear to hear relationships between pitches. Let's say the first two notes of your music are a C followed by a G. Although it is helpful to know that the first note is C and the second is G, the essential thing to know is that what you see on the page is an interval of a fifth. Think the first two notes of "Twinkle Twinkle Little Star." Hear that in your head now? A fifth is a fifth is a fifth, and once you can perceive the interval on the page, you can sing it.
What is involved. Along with the basics of solfege and ear training, we will build upon your basic knowledge of music theory - keys, scales, harmony, meters, rhythms - to the extent that it will be useful to you. If you are a music theory novice, you need only learn some basics to get a handle on solfege. If you are in a chorus now, we can work with the music you are learning. If you are preparing for a vocal audition, some sight-reading practice will put you way ahead.
The benefits. As you develop skill with solfege, you will learn music faster, understand it better, sing more in tune, retain music better, and develop more independence and confidence in singing your part in multi-part music. And, perhaps most important, you will have more fun singing!