Sort & Filter tools let you choose what to display, and in what order. At the base level, this tool sorts cells containing text from A to Z, and cells containing numbers from lowest to highest. It can also sort by color or icon. Sorting and filtering helps surface only the data you need.
F. Sheet Tabs: This is where the different sheets in your workbook can be found. Each sheet gets its own tab, which you can name yourself. These can be useful to separate out data so that one sheet doesnt get too overwhelming. For example, you might have an annual budget, where each month is a column, and each row is a type of expense. Instead of keeping every single year you track on one sheet and scrolling horizontally, you can make each tab a different year containing 12 months only.
The Format paintbrush copies everything related to the formatting of a selected cell. When you select a cell and click Format, you can then highlight a whole range of cells, and each one will take on the formatting of the original cell, without changing their values.
Use Fill to take a cells contents and extend them in any direction for as many cells as you want. If the cell contains a value, Fill will simply copy the value over and over again. If it contains a formula, it will recalculate its relative position for each new cell. If the first cell equals A1+B1, then the next would equal A2+B2, and so on.