Update README.md

Author: Efrat19

README.md

@@ -3,7 +3,7 @@ For the sake of learning rust and Apache Arrow/flight (and for fun) I wrote an e
 
 ## Why
 [Arrow-flight](https://arrow.apache.org/blog/2019/10/13/introducing-arrow-flight) is a gRPC based protocol, originally developed as a more efficient alternative to JDBC/ODBC.
-With the adoption of monitoring best practices and the rising of prometheus scraping-based metrics collection, metrics network volume is expected to grow heavier and require more effieciency.
+With the adoption of monitoring best practices and the rising popularity of prometheus and scraping-based metrics collection, metrics network volume is expected to grow heavier and require some optimizations.
 Luckily flight comes with 2 effeciency advantages:
 - Data is streamed over gRPC instead of openmetrics HTTP
 - While supporting regular gRPC clients as well, a flight server + flight client will perform de-deuplications on the data using flight requests. This is a significant optimization for openmetrics exporters sending lots of redundant metrics over scrape intervals.