When asking in Spanish "What are you looking for today?" do I have to use "son" for "are?"
When asking "what are you looking for today? Do I never use "son" for "are"?
Hola Guillermo. Welcome to the forum.
I'd say ....
"Qué buscas hoy? (informal)
"Qué busca hoy? (formal, polite)
The present tense (ind. & subj mood) is usually translated as he looks for, he is looking for, he does look for. It can also be used in some past and future contexts. It's more versatile (or more ambiguous) than the present tense in English as it doesn't require all of the auxiliary verbs.
Welcome to the forum!