も

The particle 「も」has the meaning of "also" or "too," and is used to add something of the same kind to what was mentioned before, such as objects, events, people, etc.
Sometimes, the first object, event, or person is not explicitly mentioned but is understood from the context of the conversation or text. For example, in the sentence 「今日も曇りだ。」(Today is also cloudy.), we understand that yesterday or on previous days it was also cloudy.
「も」doesn't just directly follow nouns but can also come after particles like に、へ、で、と. When the original particle is が (indicating the subject), は, or を, 「も」replaces them.