What does this mean in the app?

What does this mean in the app?

Just noticed this new graphic in the app. Anyone knows what this means?

u/theskippers — 6 days ago
▲ 3 r/runna

Best way to start a new plan after a completed plan

So I am coming up on the final week of my 14 week 5K improvement plan. The plan ends with a 5K race which I am looking forward to. No doubt the plan has improved my time substantially.
My question is, once my current plan ends, what is the best way to start a new plan to continue to improve my 5K time? Ideally I would like to incorporate my current amd improved fitness into the new plan

Thanks

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u/theskippers — 4 months ago