Eating salad all day?

Well for breakfast I had salad Like (carrots, lettuce, and those favored dryed bred things) And i had that again for 2 more times and I finished up 1 bag in a half of salad, they come in these bags you could buy at wal mart . I eat salad with ranch dressing and that's bout it .. So is this maek you gain weight or bad for you? thanks.