Typically, “see” means the tour bus will drive by so you can see it. “View” means a photo opportunity or brief stop. “Visit" means a more thorough stop -- where you can explore a bit. But this isn’t always the case, so you should ask if you want to be sure, or if a particular site is important to you.
“Land-only”
“Land-only” typically means the price covers just the land or hotel portion of the vacation.
“European-Plan” vs. “All-Inclusive”
“All-inclusive” usually refers to a resort hotel where all your “extras” are included, like drinks, meals, etc. And yes, even though it seems impossible, everything really IS included, and it’s most certainly a better deal than the “European plan" -- or a la carte.
“Oceanfront” vs. “Oceanview” Room
“Oceanfront” directly faces the ocean.
“Oceanview” is a room which provides some sort of view -- you might have to lean out the window to get it, however.
“Sightseeing” vs. “Orientation Tour”
A sightseeing tour is accompanied by a local city guide, and you may make stops.
An orientation tour points out places of interest you might want to visit on your own later.
Transfers
Transportation between the airport and your hotel when you arrive and depart.