The term isologotype (or isologo) occurs when an isotype and a logo are joined. Or put another way, an image and a text are presented that are united in the same symbol or graphic identifier.
When registering the brand image this can present some problems, especially because of the cost that is usually higher than if only a logo is presented, for example.
Although we have to take this into account, isologists also have advantages. On the one hand, the identifier is only presented in a single symbol, including image and text. Which in turn has other advantages, for example printing.
By only having to print a single symbol shape, you will save printing costs and space. Take for example the McDonald's brand. In many of its products there is only one logo (which is an M in yellow and the outside in red), which has the advantage that it can put that impression on its products instead of the full name of the brand. In addition to saving printing cost, it saves space cost for the product, and include other extra decorations.
Although not only printing costs and space are saved, but it also avoids straining the memory. Logos, in general, try to make the idea of and brand that you want to present. In this way, when an isologotype is presented in a unified whole, it is easier for the user to remember and associate it with the brand, with the objectives and with the company philosophy.
That's why isologos (and all logos, in general) are a great element of marketing to use the brand, the company and its commercial activity to be remembered and associated by more people in an easier way.