Learn to speak the 4 different Mandarin tones, which change the meaning of a word. Gabrielle speaks them using different words as examples, with the Pinyin displayed for each. Like for "ma":
"mā" - the first tone; this means "mother" "má" - the second tone; this means "numb" "mǎ" - the third tone; this means "horse" "mà" - the fourth tone; this means "swear"
This video (see at YouTube) is of beginner level difficulty. It has subtitles in English and Pinyin.