What is the use of enemy's portal key

I'm new to ingress and I'm totally confused about the items in my inventory. Recently I hacked few resistance portals and I got their portal keys I know what to do with my own keys and I know that I can't link to an enemy's portal.So my question is What is the use of enemy's portal key in ingress??

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What does the portal key do?

A portal key (often just called a key) is an item which permits agents to create links and remotely recharge portals.

Can you go through enemy portals Splitgate?

Enemies can go thru your portals? you can go through enemy and teammate portals, unless they close them. The game never told you that you can't go through enemy portals.

What are portals in ingress?

A portal is an aperture in the fabric of space through which exotic matter is emitted into our world. Ingress strategy revolves around control of portals.

How do I submit a portal in ingress?

Submitting a Portal NominationTap the Main Menu button and select NOMINATIONS. Note that the Nominations button won't appear until you've reached level 10. Review the information screens and tap NEXT to proceed. Set the Portal's location by tapping and dragging the map until the marker is in the correct location.

Learn How to Use Your Enemies | 48 Laws of Power Law 2 Part 2

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