Here's why:

* Composition: Tissue paper is primarily made of cellulose fibers, which are organic compounds. Organic materials generally do not conduct electricity well.

* Structure: Tissue paper is very porous and has a loose structure. This means there are gaps between the fibers, making it difficult for electrons to flow through.

* Moisture: Even a small amount of moisture can make tissue paper slightly conductive. However, in its dry state, it acts as a very good insulator.

In contrast:

* Conductors: Materials like metals, water (with dissolved salts), and graphite allow electrons to flow freely, enabling them to conduct electricity.

Therefore, tissue paper is not a good conductor of electricity and is generally considered an insulator.