The phrase 'countless benefits' is correct and usable in written English. You can use it whenever you want to emphasize that there are many advantages or positive outcomes. For example: "Eating a healthy diet can provide you with countless benefits, from improved energy levels to better digestion.".
"There are countless benefits to mindfulness, which is, you know, all about savoring.
The countless benefits of such a post easily outweigh the salary costs.
He's fought, unsuccessfully by and large, to preserve their fishing lifestyle, and he's done countless benefits for local causes.
And college has countless benefits even for out-of-box thinkers, from networking opportunities to learning practical skills that apply to starting companies.
Williams kept his own pace: eighty movies, twenty-six televishowsshows, countless benefit performances, many friends, a large family, two divorces, addictions, rehabs, heart surgery.
Through the years Ms. Raitt has been a scrupulous musician with a conscience, supporting human rights, feminist and environmental causes and playing countless benefit concerts.
This critical financing helps farmers, ranchers and forest owners carry out conservation practices that provide countless public benefits.
I love the desktop app, it’s always running on my Mac. Ludwig is the best English buddy, it answers my 100 queries per day and stays cool.
Cristina Valenza
Retail Lead Linguist @ Apple Inc.