Surface the text from the OSV elevator pitch (#2112)

This can be referenced in the upcoming blog for USNs.

Author: andrewpollock

docs/index.md

@@ -6,14 +6,16 @@ nav_order: 1
 
 [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/google/osv.dev/badge)](https://api.securityscorecards.dev/projects/github.com/google/osv.dev)
 
-[osv.dev](https://osv.dev) is a [vulnerability database](https://osv.dev/list)
-and triage infrastructure for open source projects aimed at helping both open
-source maintainers and consumers of open source.
+OSV enables developers to identify known third-party open source dependency
+vulnerabilities that pose genuine risk to their application and its environment,
+so they can focus remediation efforts on the vulnerabilities that matter and
+sustainably manage vulnerabilities that do not affect them.
 
 [This repository](https://github.com/google/osv.dev) contains the infrastructure
-code that serves [osv.dev](https://osv.dev) (and other user tooling). This
-infrastructure serves as an aggregator of vulnerability databases that have
-adopted the [OpenSSF Vulnerability format](https://github.com/ossf/osv-schema).
+code that serves [osv.dev](https://osv.dev) (including the
+[API](https://google.github.io/osv.dev/api/)).  This infrastructure serves as an
+aggregator of vulnerability databases that have adopted the [OpenSSF
+Vulnerability format](https://github.com/ossf/osv-schema).
 
 [osv.dev](https://osv.dev) additionally provides infrastructure to ensure
 affected versions are accurately represented in each vulnerability entry,
@@ -22,6 +24,9 @@ through bisection and version analysis.
 Further information on the infrastructure architecture is available
 [here](contributing/architecture.md).
 
+[OSV-Scanner](https://google.github.io/osv-scanner/) is the first-party tool
+that leverages OSV.dev's data, using its API.
+
 ![This is a diagram that shows the relationship between the vulnerability
 databases that use the OSV format and how all those entries are collated at
 OSV.dev. Open source users can query for known vulnerabilities by version number