These are nouns that name specific people, places, things, or ideas.

Nouns name people, places, things or ideas that are generic.

Which of the following is proper noun?

"They sang at the Metallica concert".

Which of the following is common noun?

"His religion was important to him."

Which of the following is common noun? 

"We landed at the airport."

We capitalize the words referring to a supreme being and to sacred writings. 

We capitalize the first word and all important words in the title of a story, book, or other works. 

We capitalize the last letter in the sentence. 

We capitalize the personal pronoun I.

we capitalize the first word in a direct quotation.