Valorant or riot client won’t open up and all that shows up is a transparent riot games then nothing happens. I just downloaded it yesterday

I've had countless people tell me to turn it on. When I asked why they all said "just do it" and claimed it made them play better. It would be nice to actually know what it does.

I was in a standard Unrated game today and was in a duel with a Chamber, I hit him for **162hp** and as seen on the attached screenshot, he did not die from it. No healing could have been involved as all damage was dealt within 5-ish second...