For possessive pronouns:
* мой (moy) - for masculine nouns
* моя (moya) - for feminine nouns
* мое (moe) - for neuter nouns
* мои (moi) - for plural nouns
For things that belong to you:
* моё (moyo) - for singular nouns
* мои (moi) - for plural nouns
Examples:
* Это мой телефон. (This is my phone.)
* Это моя книга. (This is my book.)
* Это моё пальто. (This is my coat.)
* Это мои ключи. (These are my keys.)
* Моё имя Анна. (My name is Anna.)
Note: The choice between "мой" and "моё" depends on the gender of the noun following it.