A website which is kept up to date is a website which will be chosen in search engine results. Search engines want to always ensure they are offering the most relevant results to their audience and one of the ways they try to do this is by choosing websites which have been updated recently.
Updating your website involves running any theme, plugin and WordPress updates to make sure your software is secure. This should be done every couple of weeks. It’s also a good idea to have a thorough walk through your website and update any text which feels a little old, swap out images, check contact forms are working and make sure all the links are leading to where they’re supposed to.
All these will make Google sit up, pay attention and choose your website.