Rating: As noted above, a centre's rating is an average of all its reviews. Reviews older than one year are excluded from this calculation, so if your centre has started to receive more positive reviews recently, this will have an even greater impact as time goes on.
Ranking: As noted above, a centre's ranking compared to other centres is determined by its average rating and the overall number of reviews it has received. Centres with good ratings and few reviews won't rise to the top until they receive enough reviews for the rating to be considered trustworthy.
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