This is the 107th most frequent Catalan word.
moltes
"Moltes" means "many" or "a lot of" in English (feminine plural).
In this sentence, 'moltes' means 'many' or 'a lot', used to intensify the gratitude being expressed.
Moltes gràcies per la teva ajuda.
Thank you very much for your help.
In this case, 'moltes' highlights the abundance of choices available.
Tenim moltes opcions per triar.
We have many options to choose from.
Here, 'moltes' is used to indicate an unspecified large number of people.