What is the meaning of や行?

the eighth row of the 五十音図 (literally “table of the fifty sounds”), consisting of the five kana や/ヤ (ya), い/イ (i) (alternatively, 𛀆/𛄠 (yi)), ゆ/ユ (yu), え/エ (e) (alternatively, 𛀁/𛄡 (ye)) and よ/ヨ (yo), two of which are taken from the あ行 (“a-row”) to represent classical grammatical inflection in modern text

Source: wiktionary.org