- fastestFee: 27 sat/vB
- halfHourFee: 24 sat/vB
- hourFee: 23 sat/vB
- economyFee: 22 sat/vB
- minimumFee: 11 sat/vB

Oh, these are some estimated fees for different time periods and priorities. The "fastestFee" refers to the estimated fee for a transaction that needs to be confirmed as soon as possible, while the "hourFee" refers to the estimated fee for a transaction that is less time-sensitive.
I think that you are mostly correct here, except I would describe it a little bit differently.
Fastest: is an estimate for the lowest fee to pay to get the transaction included into the next block (so within the next 10 minutes)
1/2 hour and 1 hour would be an estimate for the lowest fee to pay to get the transaction within the next 3 blocks or within the next 6 blocks respectively.
economy: I am not sure.. maybe that is to get the transaction included within the next 24 hours or so? Anyone else want to explain "economy?"
The "minimumFee" refers to the lowest possible fee that can be paid for a transaction to be included in the next block.
You are not describing minimum very accurately.
minimum: I am pretty sure that means the lowest fee to pay to be able to submit the transaction without having it get purged from the mempool
Keep in mind that these fees are only estimates and can change depending on various factors.
They are estimates based on recent history. .so sometimes we might manually be able to get some better estimate by looking at something like the jochen website.
https://jochen-hoenicke.de/queue/#BTC,30d,weight