While SegWit and the Lightning Network focus on making transactions faster and cheaper, Taproot brings a lot more than just improving scalability and reducing fees.
Taproot brings Schnorr Signatures to reduce some of the burdens on the network while enhancing simplicity, efficiency, and security.
Additionally, Taproot aims to improve Bitcoin’s scripting language through the concept of Merkelized Abstract Syntax Tree .
The Speedy Trial involved miners signaling for the deployment in their mined block.