Goldfish cloud applications are not to do better what the majority are doing, optimizing each link in the chain (minimizing costs, maximizing efficiencies); they require changing deep premises about operations, and they are good to achieve what seems impossible to that majority: increase productivity, with less effort and simpler processes.
I mean here "You are the best at tennis" "and "you are best at tennis", "choose the book you like the best or best" both of them can have different meanings but "most" and another adverb in a standalone sentence has a completely different meaning.
Both sentences could mean the same thing, however I like you best. I like chocolate best, better than anything else can be used when what one is choosing from is not specified I like you the best. Between chocolate, vanilla, and strawberry, I like vanilla the best can be used when choosing from some choices.
The word "best" is an adjective, and adjectives do not take articles by themselves. Because the noun car is modified by the superlative adjective best, and because this makes the noun car definite in this context, we use the. It is best not to do something. Here, we have the adjective best, but this adjective is attached to no noun.
In your context, the best relates to {something}, whereas best relates to a course of action. Plastic, wood, or metal container? What was the best choice for this purpose? Plastic, wood, or metal container? What was best to choose for this purpose? Either is acceptable, and the practical meaning is the same, but their referents, implicit not explicit, are different.