'Price Improved' means that your trade is executed at a better price than the current market price. For a buy order, this means getting the shares at a lower price than expected, and for a sell order, it means selling at a higher price than expected.

'Average Speed' refers to the time it takes for trades to be executed. A lower average speed means your trades are completed faster, helping you take advantage of market opportunities in a timely manner.

'At NBBO or Better' means that your trade will be executed at the National Best Bid and Offer (NBBO) price or a better price. The NBBO represents the highest bid price and the lowest ask price available in the market across all exchanges. This ensures you receive the most competitive pricing available for your trades, helping you achieve optimal buying and selling conditions.