It is clear that depending on the person and the privacy you need to have, you should use this product or not. In my case, an acquaintance has asked me about the possibility of installing a screen protector that allows him to work on his 13-inch MacBook air no problem so that someone next to you can see what is being shown on your screen.
3M is a company that for several years has had screen protectors with a privacy filter on the market with which you will be able to keep your data safe from prying eyes.
Little can we say about what this product is and it is simply that it is a treated plastic sheet that causes that when the viewing angle with respect to the screen exceeds a few degrees, it darkens and protects the data from prying eyes.
For its installation we have to clean the screen very well and be in an environment in which there is no suspended dust or the possibility that pet hair can stick to the protector before gluing it to the screen. We say this because we can get to spoil it in the installation, and taking into account the price of it, that it is not exactly low, we have to be extremely careful in its installation.
If you want to know more about this product you can visit the following Amazon link in which the virtues of this product are explained. Its price is about 69 euros and it gives you the possibility to go to other related ads in which you could buy other screen configurations different from the one I propose, that is, a 13-inch Macbook Air.
So if you want privacy on the screen of your Macbook, you just have to analyze this option and decide whether to install it.
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