Why would you want to stop updates to a particular plugin?
Because the newer plugin may have features that you may not like. An update for example could even remove certain features or causes your website to malfunction.
It is important to note however that neglecting to update your plugins and themes can result in missing out on essential security updates.
Google uses site speed as a ranking signal for both desktop and mobile searches. This video shows 3 easy steps to improve your site’s speed.
Doing the above can drastically improve your page score with Google. The best part is you do not need any coding experience. Some of these changes can break your site’s functionality. but you can turn off the features that cause that. Chances are that you will be able to use all the features and your site will be much faster.