Insertion (noun)

1. The act of inserting something.
2. The state of being inserted.
3. A thing that has been inserted.

Origin:

From the latin word insertio, from the verb inserĕre ("to put in, introduc.e")

Examples:

1. The insertion of a new page in a document.
2. The insertion of a gene into a genome.
3. The insertion of a new paragraph in a text.
4. Insertion of the needle for an injection.
5. Insertion of new products in the market.