How to avoid getting into spam or promotions
From one of the videos, the speaker said using generic words like 'free' and 'discounts' may increase the risk of having your email sent to spam. I realized all the promotional emails in which I opted-in that contain 'sales' actually get into my inbox while others that I did not subscribe to but have similar words go into spam or promotion. How does this work?
Also, what are the keywords to avoid in a subject title?