The following example demonstrates one octave of the major scale ascending and descending in every key, moving anticlockwise around the key cycle. The scales are shown here without tablature to help improve your music reading. There is a vast amount of written music which does not contain tablature. If you can not read notation, it means a large proportion of the world's music is unavailable to you. On the other hand, if you can read music well, it is easy to learn a new style or music written for any instrument, not just guitar.
You already know all the notes contained in these scales, and they can all be played in the open position or first position. Chords are commonly built on all seven notes of each of these scales and used as the basis for chord progressions within each key. The better you know the scales, the quicker you will be able to work out chords for songs in any key, and the easier you will be able to transpose chord progressions from one key to another.