Exist several ways to apply or remove cell borders, you can choose anyone:

Excel includes a variety of built-in formats that cover general, numeric, currency, percentage, exponential, date, time, and custom numeric formats. You can also design your own custom formats based on one of the built-in formats.

When a comment has been inserted in a cell, the little red triangle is being displayed to indicate a comment in a cell. This tip is how to hide/display this indicator.

In addition to manual data filtering Excel enables fully automated filtering based on data from the specified range of cells. Before you can use the advanced filtering feature, you must set up a criteria range. A criteria range is a designated range on a worksheet that conforms to certain requirements.

Sometimes it is necessary to compare two Excel worksheets. E.g., compare balance sheets for different periods of time. You can do it by comparing worksheets side by side in two automatically linked windows.

Sheets can be grouped (connected) to facilitate creating or formatting two or more identical sheets. For example, you can create one sheet and copy it to two other sheets, or you can group three blank sheets and enter and format the content once-no subsequent copying required.

You can edit data in cells this in several ways:

There are several operators that could be used in formulas.

If you need to enter lots of numbers with a fixed number of decimal places, Excel has a useful tool:

Applying a number format to a cell doesn't change the value, but only how the value appears in the worksheet. Formatting can play a joke with you, e.g., sum of values seems incorrect because Excel displays a limited number of decimal places and their sum is not equal to the real sum.