If you had not prepared for the Google next update i.e. Mobile speed update which will impact ranking only on Mobile devices, then your website traffic is going to suffer. Earlier, Desktop ranking was a primary source of ranking for mobile devices which has been changed to Mobile now.
This algorithm will start to roll out from the first week of July, 2018.
If your website takes 5-10 seconds more than the industry benchmark, then that will not be an issue.
Measures to be taken:
- If you had AMP pages then there will be no issue regarding page load time. As AMP pages is a cache version and are loaded within an instant.
- If the website has separate Mobile & Desktop pages. Then, Mobile Page load should be taken into account.
- Usability comes in to play i.e. if a website has something unique and offers more than that of competitors then Speed update will not be a crucial factor.