Decide how many columns and rows you need. The Alignment setting is for allowing text and images to the right or left of the table (the same setting used in Insert images). Avoid this function if you can. It can be tricky to get right since the table becomes "movable" so that text and images fit alongside it. That said, it is a great setting to be used for what it is intended for - if you can’t find another solution. But use it only when necessary and think twice about whether you really need it.
A piece of advice that makes it easier to work with tables...
When you have inserted the table, click on the Save button for the text field. When you then go to editing mode again, you will notice a space has been added to all the cells making them a little bigger and easier to work in the table.
Table instead of several spaces and tabs
The best reason for using tables is that they are much better than typing many spaces and tabs cannot be used at all in a website. This is because the underlying HTML code does not know what a tab is. If, for instance, you have a list with several columns, your best option is to create a table and arrange the information in the table. This is useful for pricelists, product sheets, menus, address lists, and more.
Warning for several spaces. Don’t do it; the results can be crazy. What happens is that in HTML speak, this becomes a non-breaking space and this code can cause a lot of problems.
It is much better to use tables instead.