SVG's are a great way to not only speed up your website but to also ensure that your brand and graphics are always displayed in the best possible way.
The clue is in the name... SVG stands for Scalable Vector Graphic, which means it's created as a vector, which is essentially the same type of graphic that is used to print at extremely high resolution, at pretty much any size... imagine a 50 foot wide logo on the side of a building... that's a vector, a logo on the back of a truck... that's a vector, so why not use vectors wherever we can do.
They look perfect... literally perfect, because they can be scaled to any size without pixelating. I used to use transparent PNG files for all of my company brand logos on websites as they were generally pretty high resolution and gave you the added benefit of a transparent background, meaning you could have different colours etc behind them.
With the advent of super high resolution screens becoming the norm, I noticed that these images were looking pretty pixelated (blurry). The main place that I noticed this to start with was on my iPhone - due to it's retina display, it wants to show high resolution graphics, so a PNG logo stood out like a sore thumb to me. I do have very good vision, so perhaps I notice it more than most, but it really started to bug me, so I looked into how I could fix this issue, and SVGs were the answer.
As I mentioned before, they are scalable, so even if someone has an enormous display like a 3440 x 1440 screen resolution, the image will not pixelate in any form... they could literally zoom in to 1000% and it would still be crisp and clear.
The other benefit is that they maintain transparency similarly to PNG files, so you can continue to use them in various coloured layers etc.
The final benefit is that they are tiny in file size and will help your website load quicker, and get your brand in front of the user more effectively.
So, if you aren't doing it already, use an SVG wherever you can in your website, be it your own logo, partner logos, or any sort of graphics - they are just better!