It’s been thought that 70 characters or less is best for a title tag. However, as Cyrus explains, recent research shows that Google will index 150-1000 characters.
Short Title Tags
Google displays only first 70 characters in SERPs.
There is a direct correlation between the position of the keyword in the title tag and how important it is in the query.
Shorter title tags are more relevant with the rise of social media.
Best Practices are Guidelines, Not Rules
Always experiment, though not too much, to see what works best for you.
Write for users – meet their expectations from the SERP.
Keep important keywords first, as close to first position as possible.
If you go over 70 characters, don’t stress. Remember, best practices are what works best most of the time.