Comment on page
Time Since Last Block
The time elapsed between the current time and the last block at the tip of the chain (the most recent block).
The metric is computed as the time difference between the arrival of the block at the chain tip as seen by our nodes, and the current time. As a timestamp for the block at the chain tip this metric uses the concept of miner_time (for more on the differences between miner_time and consensus_time refer to our wiki article on normalizing timestamps). For Bitcoin, miner_time can be set arbitrarily by miners which can impact the value of this metric.
Bitcoin (BTC), Ethereum (ETH)