Bitcoin Cryptocurrency Mastering Development

Why do some wallets not need syncing?

I recently downloaded the Bitcoin Core wallet, and was mildly inconvenienced by the fact that I had to spend 4 days downloading 200 GB, but I just beared with it.

However, I soon discovered that some wallets like Electrum and Bitcoin Wallet don’t need syncing at all, which makes me curious about why some wallets need syncing and others don’t, and what are the benefits to syncing as it takes up a lot of space, time, and bandwidth?

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