Using SVG logo in your WordPress site is one of these techniques that bring only good effects as it optimizes your website on at least 2 levels:
Firstly, it will make your logo look as sharp as possible on a device it is displayed on. It means it will always look as intended. No more multi images for the logo to cover various screen DPIs.
Without a doubt, websites must be fast. Although today the Internet is high-speed, users have started to pay attention to the speed of page opening. Even 5 seconds of waiting for content may discourage a potential customer from staying on your site and taking advantage of your offer.
Therefore, make sure you prepare and optimize the content on the website right now. Remember that Effective Image Optimization is one of the keys to success!