How to use the information, to get the best out of the film & lens.
With transparency film there's not a lot in the data sheets that will help you maximize the film. There may be some reccommedations about the intended use, some are better for portraits or landscapes or product shots. Things like "vivid" or "saturated colors" generally mean more contrasty and not good for portraits. It may be that one film has a couple of different versions 100 & 100F with the F designating a finer or smoother grain and better suited for skin tone.
Usually there are some basic film specs and handling both before and after exposure. For colour neg there is a bit more, generally around grain and intended use. There may be some advice about exposure under different light sources. Both films will give some info about reciprocity failure, i.e exposure compensation for long exposures. The full tech sheets, available from the manufacturer will have a bunch of graphs outlining grain and spectral sensitivities.
With B&W films, there will be all this and some basic development reccommendations, these are just starting points. Likely there will be some info regarding exposure adjustmments for the standard B&W filters. Kodak use to supply suggections about which filters to use for skin tone, landscapes etc.
The best info would be your own notes. Keep good notes while shooting and then review them while looking at your images.