There can be many different reasons you may want to start to play on an instrument, this can range from the love of music to impressing girls in a high school band. Luckily it's never too early or late to start building or improving your musical skills. Piano is still considered the most popular apparatus when choosing a musical instrument to learn, however guitar lessons for beginners isn't far behind.
There are multiple guitar methods you can choose from, when first pursuing classical guitar lessons; tab and chords being the two most popular. Both have their advantages, with that of the first one being that it is easier to visualize. Since the music sheet portrays the neck plate, you instantly understand where to hold down the strings. Most non-classical musical pieces on the internet are found in this tablature format, so there is a large database in which you can find nearly any script, making tabs probably the most popular way to learn to play.
The second most popular option, when choosing from the guitar methods, is learning to play chords. This is fairly more complicated, because you have to be able to accurately read a music sheet and correctly position every note. Learning the described guitar methods aren't necessarily contradictory to each other, because tabs can also be used to display chords on a music sheet.
In order to learn guitar, both may be equally important, because the knowledge of chords is usually necessary to play support for any other instrument or to learn classical music. However since notes on the guitar can't be clearly separated from each other, whereas a key stands for a note on the piano, it is hard to define where to hold the string on the neck plate when playing; as this ability needs to be attained via practice and routine. The tab method shows where to press the strings, during a guitar lesson, making the attempted piece a lot more unequivocal.
When starting to learn to play guitar, the easier of the guitar methods are tabs, however after some practice it would be a great idea to learn chords as well. This way you can acquire a more complex knowledge and won't have trouble reading and playing any musical piece.