A lot of rumors fly around in regards to SEO. With so much changing and so much being said it can be difficult to filter out the noise.
This video series may help. In this episode Google and Microsoft team up to explain some myths on structured data.
Documentation mentioned in this episode: Intro to structured data → https://goo.gle/structured-data-intro Overview of supported structured data in Google Search → https://goo.gle/search-gallery Structured data testing tool → https://goo.gle/2K9rTo5 Rich results rest → https://goo.gle/30SEWA3 Rich result status reports → https://goo.gle/rich-results-report