Hotel length of booking bid adjustments marked legacy, with a formula to convert them for Search ads

Google relabelled its help document on length of booking bid adjustments, formerly length of stay in Hotel campaigns, as legacy. The document now explains how to reproduce Hotel campaign bidding in Search campaigns for travel, which do not multiply the base bid by the length of stay.

Hotel campaigns automatically multiply the base bid by the trip length, so Search campaigns for travel need a manual adjustment to match. The document gives the formula: the Search adjustment equals the length of stay multiplied by (1 plus the original Hotel adjustment), minus 1. With no existing Hotel adjustment and a $2.00 base bid, the equivalent adjustments are +100% for 2 nights, +200% for 3, +400% for 5 and +900% for 10. With a +5% Hotel adjustment and a 2-night stay, a $2.00 base bid reaches $4.20 in Hotel campaigns, which needs a +110% adjustment in Search campaigns for travel. Google did not say why the page was labelled legacy.