This ad might seem similar to Nike's ads earlier in this lesson because it's about sports, but the ad isn't about moving the audience towards sports.
It's about making the audience stop and appreciate the work that mothers do for their children, both in athletics and life in general.
The beautifully-shot footage of mothers doing the hard work of waking up early, getting their children ready, ferrying them to events, giving them support and encouragement, coupled with the steadily building music creates a reflective but uplifting mood, which is then released in a combination of joy and melancholy as the athletes complete their events, creating an final feeling of gratitude and appreciation.
Why would the speaker do this?
In this instance, the speaker, P&G, is a massive multinational conglomerate with many household brands that sell primarily to mothers, so this ad celebrates the labours of motherhood (and parenting in general) and obliquely encourages the consumption of P&G's related goods.
Other P&G ads could sell specific products or lines, but this ad, associated with the London Olympics, wanted to make a bigger, more emotional and cultural impact.