photo
The Italian word for 'photo' is 'foto'. It is used in the same way as in English, to refer to a picture that has been taken with a camera. Just like in English, 'foto' can be used to talk about both digital and physical photographs.
This is my favorite picture.
In this sentence, 'foto' is used as a noun to mean 'picture'. It is considered feminine ('la foto') in Italian, so 'mia' is also feminine to match. This phrase is a common way to talk about personal belongings.
I am looking for a photo that I took yesterday.
In this phrase, 'foto' is still a noun meaning 'photo'. 'Che ho scattato ieri' is a relative clause providing extra information about the photo. It means 'that I took yesterday'. 'Sto cercando' is a present continuous tense (I am looking) which is similar to English usage.
I lost the photo you gave me.
In this example, 'foto' remains a noun, but is used with a past tense verb 'ho perso' (I lost). The phrase 'che mi hai dato' is another relative clause meaning 'you gave me'. The Italian past tense can often be used in a similar way to its English equivalent.