A lot of translators work with the Microsoft Office Suite, in which MS Excel is included. The first advantage is therefore that they do not need to buy any specific tool for working with our MS Excel glossaries. This program is moreover very easy to use, especially for consulting glossaries. It is also quite flexible since you can quickly add or change information, insert new columns with data for all entries at once, and even define a password to lock any unwanted edition.
Nevertheless, one can also argue that this program is not a professional terminology tool. Moreover, managing multilingual glossaries can be quite hard, especially when entering a very high amount of information. In such cases, it might therefore be better to use a tool specifically conceived for terminology management.