Indeed, we show additional translations under the card to introduce you to the different meanings a word can have. As you see, the four-letter form 'mets' can mean many things. The translation that is necessary for the sentence is directly under the card: I put. Other translations appear underneath. The translation 'un mets' – 'a dish' is the first of them because you are already familiar with 'mets' as a verb (it's on the card, in the active sentence).
Some people find it easier to ignore the additional translations and just concentrate on the one that's directly under the card. It's the only one necessary for the particular sentence.
Bonne continuation !