A few simple tips based on my personal experience:
Never
bluff, players against you are not very strong and do not believe in
bluffing;
Deal your blinds easily if someone raised and you have a weak card;
Your main weapons are discipline and endurance;
Don't chase weak players at the table;
You can limp from early or middle position. Yes, this is not the case in the basic strategy, but in freerolls you can use it;
Play carefully in the early stages of the tournament. There are a lot of all-ins at this stage and you shouldn't fall into dubious hands for the entire stack.
Pros and cons of freeroll tournaments
how to understand which freerolls are worth playing, the choice is large. Pay attention to the prize money. Try to play those freerolls where the prize pool is as large as possible, as there is an opportunity to get a good amount for the first place. Further, the number of players: the more participants in the freeroll, the less chances in mathematics to win such a tournament. If this is a freeroll in which the prize pool is not money, but a ticket to a more serious tournament, make sure you can take part in it if you get into the prize pool.
The opportunity to win without risking money attracts the attention of many players.