Test cricket is played over up to five days, with each team normally batting twice. The long format makes time a strategic resource: teams weigh scoring speed against the wickets they have left and the overs available to dismiss the opposition.
A captain may declare an innings closed before all ten wickets fall. The decision gives the bowling side more time to take wickets, but it also sets the opponent a target or leaves time for a result. Declarations depend on the match position, weather forecast and remaining playing time.
The follow-on is an option available under specific first-innings lead conditions in a Test. If enforced, the team that batted second must bat again immediately. Whether a captain uses it depends on the lead, bowler workload, pitch behavior and the time remaining.
Sessions help viewers follow the match in manageable blocks, but the exact schedule varies by venue and interruptions. A team defending a target may prioritize overs and wicket-taking chances, while a side batting to save a match can focus on partnerships, leaving balls and preserving wickets.