Life span of a tweet is found to be one hour. As per Sysomos it is analyzed withing this first hour, all retweets happens. This means , if there is no retweet within this first hour, than it will never ever happen.
Analysis also showed that only 1.63% of all retweets will happen in the second hour while 0.94% retweets will happen in the third hour.
Same thing applicable to replies too
During an interaction with Michelle Deone (
However, this lifespan is again relative to a number of factors. Mostly, the number of your active followers. Having a large number of followers surely helps with the impressions side of things. If another user with 1000 followers retweets your tweets, then it means that another 1000 people will be potentially seeing your tweet. Therefore interactions that your tweets get extend your tweet’s lifespan substantially.
Now there are always some tweets that break this trend. Many a times one of your followers goes through your old tweets and retweets one of the tweets that seem to be in conjunction with a current hot topic, and the tweet ends up getting substantial attention by the Twitterati. However such occurrences usually happen rarely.“