I’m curious about how Monero tunnels work and why they are important for privacy and anonymity. I know that Monero is really great at keeping transactions secret, But I don’t understand how the tech really works. So if Monero keeps transactions secret, does that mean using Monero as a tunnel makes it even more secret?

I’ve read of some of some tech that uses Monero this way and that’s:

• I2P-zero:: A way to use I2P with Monero. You need to download a small programme and install; it on your computer. From what I understand if you use this, it makes your internet look like a cluster of random numbers and letters. Where no one can tell where you are or what you are doing online. Thing is you need to download it for it to work.
• Houdini Swap: Also uses Monero as a tunnel. So the way I see it, if you have some crypto let’s say BTC and you want to change it to ETH, it will first change your BTC to XMR on one site, then send the XMR to another site and change it to ETH. So a really cool trick if you ask me. Unlike other exchanges where it goes from BTC and ETH. Since Monero is a privacy coin, this definitely works.
• Kovri: Sort of using the I2P with Monero except a little more advanced. Problem is again you need to download another program like how you would with I2P-zero and set it up with Monero.
• Dandelion++: Another way to use Monero but this time without I2P. Basically, you send your transactions to other people who have Monero and they mix them up before sending them out.

Any insights on this?