A booking always is precisely one month from the date of the installation of the link (as soon as the booking is marked with "green status" in your account). You can set your booking so that its period of validity is automatically extended by a further month 14 days before the end of the current performance period. teliad recommends this setting in all cases, because only long-term links between webpages lead to the desired success. Due to this setting, bookings run for an unlimited period and can be terminated by both parties on a monthly basis. This has proven to make sense, especially in the case of large revaluations and devaluations of the PageRank, because the risk for both parties can be significantly reduced as a result.

In general, it is very important for Google that backlinks are set for long periods. Frequent changes in the backlink structure, i.e. a constant, unnatural changing of backlinks is more likely to be rated negatively by Google.