File > place
I think that there are multiple ways, each appropriate for different intents. What is your intent?
To actually import, you can do File>Place then choose your excel file, and hold down Shift as you select Open. Holding down shift will open the Import Options. Here you can select the Sheet and Cell Range that you want as well as the formatting that you want to carry over. This will import as "linked" to your excel document, meaning if you change the excel document, it will give a warning in InDesign to tell you so and give you the option to update it. You can choose to remove this link if you prefer.
Sorry if that is repeating anything you already know.