1. Les articles définis
Definite articles

2. Le, la, l’, les...
The French definite article corresponds to "the" in English. There are four forms of the French definite article:
le masculine singular
la feminine singular
l' masculine or feminine in front of a vowel or h muet
les masculine or feminine plural

3. more
Which definite article to use depends on three things: the noun's gender, number, and first letter:
If the noun is plural, use les
If it's a singular noun starting with a vowel or h muet, use l'
If it's singular and starts with a consonant or h aspiré, use le for a masculine noun and la for a feminine noun

4. Meaning and usage of the French definite article
The definite article indicates a specific noun. J’aime le champagne (m) j’aime la limonade (f)
je déteste les tomates (pl)

5. Enfin...
Tip: When learning new vocabulary, make your vocabulary lists with a definite or indefinite article for each noun.
This will help you learn the gender of each noun along with the word itself, which is important because the articles change to agree with the gender of the noun.

6. le,la,l’ ou les? 80% of French words ending with an “e” is feminine
Which means you will need to learn 20% of French words that are exception to the rule
le coca, l’ orangina, le jus, les apéritifs
la limonade, la bière, la bouteille de vin
Exception! l’eau (f)
la pression (f)
Le verre de vin (m)