Is the word promoção the same in Brazilian and European Portuguese?

No.

While the word "promoção" is spelled identically and retains the same core meaning regarding job advancement or marketing/advocacy in both dialects, there is a difference in typical usage regarding retail. Brazilians use "promoção" as the primary word for sales or discounts. In Portugal, the term "saldos" is the natural and standard word for seasonal sales. Additionally, the pronunciation differs: Brazilian Portuguese features more open, clearly articulated vowels, whereas European Portuguese features more closed vowels and significant vowel reduction (where unstressed vowels are often shortened or nearly silent).

Brazilian Portuguese Examples

1. Esta camiseta está em promoção. (This t-shirt is on sale.)
2. Ele finalmente conseguiu uma promoção no trabalho. (He finally got a promotion at work.)
3. A promoção de eletrônicos está incrível. (The electronics sale is incredible.)
4. A promoção da saúde é uma prioridade. (The promotion of health is a priority.)
5. Aproveite a promoção de hoje! (Take advantage of today's sale/deal!)

European Portuguese Examples

1. Esta t-shirt está em saldos. (This t-shirt is on sale.)
2. Ele finalmente conseguiu uma promoção no trabalho. (He finally got a promotion at work.)
3. Os saldos de eletrónicos estão incríveis. (The electronics sales are incredible.)
4. A promoção da saúde é uma prioridade. (The promotion of health is a priority.)
5. Aproveite os saldos de hoje! (Take advantage of today's sales!)